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G-Shock G-STEEL 300 Series: Smaller Mid-Size Analog-Digital

G-Shock G-STEEL GST-W300-1A GST-W300BD-1A GST-W300G-1A2 GST-W300G-1A9 GST-W310D-1A

Casio is releasing a new analog-digital G-Shock G-STEEL series that has the same look and features as the GST-S100 and GST-W100 series but in a smaller mid-size form factor that is about 90% the size of the original G-STEEL. The G-STEEL GST-W300, GST-W310, and GST-S310 have a smaller size of 55.9 x 49.3 x 15.3 mm compared to the original G-STEEL size of 59.1 x 52.4 x 16.1. These models will appeal to those with small wrists or those who prefer a more formal-looking analog G-Shock that isn’t the usual extra-large size. The GST-W300 and GST-W310 models with Tough Solar and Multi-Band 6 automatic time adjustment are likely to be released in Japan and Asia only, but Casio has also announced the Tough Solar-equipped silver GSTS310D-1A with stainless steel band for a U.S. release.

Update: The GST-W300-1AJF, GST-W300BD-1AJF, GST-W300G-1A2JF, GST-W300G-1A9JF, and GST-W310D-1AJF are June 2017 releases in Japan.

Update 2: The GST-S300-1A, GST-S300BD-1A, GST-S300G-1A2, GST-S300G-1A9, GST-S310D-1A are June 2017 releases for the rest of Asia. These watches have Tough Solar power but not Multi-Bannd 6 timekeeping like the Japanese versions. This raises the possibility that more of these mid-size G-STEEL watches may be released in America in addition to the GSTS310D-1A.

Update 3: Along with the stainless steel-banded GSTS310D-1A (list price $350 USD), Casio America is also releasing the blue GSTS300G-1A2 and gold GSTS300G-1A9 with a list price of $280 USD each. These three models are scheduled for a July 2017 release in the U.S.

The G-STEEL line is known for its classy analog-digital design, stainless steel body, and a dual-layer bezel for extra protection. With its mature look, shock resistance, and 200-meter water resistance, The G-Shock G-STEEL line is suitable for both outdoor activities and more formal environments like the office and social functions. With the Tough Solar power system that uses a rechargeable battery, the G-STEEL GST-S310 and GST-W300 are maintenance-free watches that can be worn for all occasions. Other features include neo-brite luminous hands, world time (48 cities + UTC), 1/100 second stopwatch, countdown timer, 5 daily alarms, battery level indicator, and full auto double LED light with afterglow.

GST-S310D-1A: (Silver) Tough Solar, silver body, silver stainless steel band, stainless steel outer bezel. List price $350 USD.

G-Shock G-STEEL GST-S310D-1A

GST-S310D-1A on Amazon GST-S310D-1A on eBay

GST-S300G-1A2: (Blue and Black) Tough Solar, blue IP body, black resin band, resin outer bezel. List price $280 USD.

G-Shock G-STEEL GST-S300G-1A2

GST-S300G-1A2 on Amazon GST-S300G-1A2 on eBay

GST-S300G-1A9: (Gold and Black) Tough Solar, gold IP body, black resin band, resin outer bezel. List price $280 USD.

G-Shock G-STEEL GST-S300G-1A9

GST-S300G-1A9 on Amazon GST-S300G-1A9 on eBay

GST-S300-1A: (Silver and Black) Tough Solar, silver body, black resin band, resin outer bezel.

G-Shock G-STEEL GST-S300-1A

GST-S300-1A on eBay

GST-S300BD-1A: Tough Solar, black IP body, black IP stainless steel band, resin outer bezel.

G-Shock G-STEEL GST-S300BD-1A

GST-S300BD-1A on eBay

The following models are for the Japanese domestic market. The difference from the previous models is that these models have Multi-Band 6 atomic time syncing.

GST-W300-1AJF: (Silver and Black) Tough Solar/Multi-Band 6, Silver body, black resin band, resin outer bezel. List price is ¥35,000 JPY.

G-Shock GST-W300-1A

GST-W300-1AJF on Amazon GST-W300-1AJF on eBay

GST-W300BD-1AJF: (Black) Tough Solar/Multi-Band 6, Black IP body, black IP stainless steel band, resin outer bezel. List price is ¥52,000 JPY.

G-Shock GST-W300BD-1A

GST-W300BD-1A on Amazon GST-W300BD-1AJF on eBay

GST-W300G-1A2JF: (Blue and Black) Tough Solar/Multi-Band 6, Blue IP body, black resin band, resin outer bezel. List price is ¥40,000 JPY.

G-Shock GST-W300G-1A2

GST-W300G-1A2JF on Amazon GST-W300G-1A2JF on eBay

GST-W300G-1A9JF: (Gold and Black) Tough Solar/Multi-Band 6, Gold IP body, black resin band, resin outer bezel. List price is ¥40,000 JPY.

G-Shock GST-W300G-1A9

GST-W300G-1A9JF on Amazon GST-W300G-1A9JF on eBay

GST-W310D-1AJF: (Silver) Tough Solar/Multi-Band 6, Silver body, silver stainless steel band, stainless steel outer bezel. List price is ¥45,000 JPY.

G-Shock GST-W310D-1A

GST-W310D-1AJF on Amazon GST-W310D-1AJF on eBay

Update: More mid-size model options have been added. Visit: New Colors For Mid-Size G-STEEL 300: Black, Red, Silver, White

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gumby
gumby
4 years ago

Love how 55.9 mm is considered ‘small’ 🙂

G-Central
G-Central
4 years ago
Reply to  gumby

Changed it to “smaller” just for you

Chucky
Chucky
4 years ago

Any ballpark estimate as to when these will be available for purchase? I haven’t followed Casio’s Basel releases in the past so I can’t estimate a time frame. Thanks

G-Central
G-Central
4 years ago
Reply to  Chucky

G-Shock Japan just listed these for a June 2017 release. Should be seeing the GSTS310D-1A in the U.S. by July or August.

William H.
William H.
4 years ago

Do you know the price for US launch? and does it has all features like Japan/Asia?

G-Central
G-Central
4 years ago
Reply to  William H.

All we know is that the GSTS310D-1A (with stainless steel band) will be getting a US release sometime. Don’t know the price yet. It has Tough Solar power (designated by the “S” in the model number) but not Multi-Band 6 timekeeping like the Japanese models (designated by the “W”).

BobbyBuckets
BobbyBuckets
4 years ago

Weird question, but can you confirm that the bracelets on these new models are interchangeable with the older, larger series G-Steels? For example could I slap a GSTS110D steel bracelet on a GST-W310?

G-Central
G-Central
4 years ago
Reply to  BobbyBuckets

Not certain but I would assume the bands are a different size.

Guilherme
Guilherme
4 years ago

Congrats Casio engineering team!!! A “G-Stell” series litlle bit smaller (just a little… in my poor opinion could be a litlle bit more smaller…).

But i miss one option of color, the full black (as like: GST-S100G-1B)! I Hope that Casio launch the full black smaller mid size! You think that this it is possible @G-Central??? Or i’m a dreamer about this possibility?
My sincere lengths for the great website!
From Brazil, Guilherme.

G-Central
G-Central
4 years ago
Reply to  Guilherme

Yeah an all-black model would be great. I think is very possible we will see more mid-size models.

Guilherme
Guilherme
4 years ago
Reply to  G-Central

Thanks by your fedd-back!
Awesome, lets crossing fingers and wait!

G-Central
G-Central
4 years ago
Reply to  Guilherme
Guilherme
Guilherme
3 years ago
Reply to  G-Central

OHHH!!!! Great!!!!
thanks, only now i saw your post! that GST-S300G-1A1 is what i was looking for! it was worth waiting for…

Louis
Louis
2 years ago

So I have a question, is the GST-S100 is the same size as G-STEEL GST-W300, GST-W310, and GST-S310?

G-Central
G-Central
2 years ago
Reply to  Louis

Not the same size, the 100-series is bigger than the 300-series.
100-series (S/W1XX models): 59.1 x 52.4 x 16.1mm
300-series (S/W3XX models): 55.9 × 49.3 × 15.3 mm

David
David
2 years ago

Hello there, I just bought the all black GST-S100G-1BCR and pretty happy with its size. My question is among the all black one I have, the black-silver one GST-S110-1A and the other black-silver one GST-W300-1AJF, are they different in size? If so, which one is the smallest?

G-Central
G-Central
2 years ago
Reply to  David

The GST-W300-1AJF is smaller than the other two.
100-series (S/W1XX models): 59.1 x 52.4 x 16.1mm
300-series (S/W3XX models): 55.9 × 49.3 × 15.3 mm

David
David
2 years ago

I have one more question, I search the GST-S300-1A and GST-W300-1A they look very similar to each other, if not identical. What is the difference between them?