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There are other Spring Drive Chronos without GMT

 

In fact those are the most compact and attractive models (to me). You can identify them by smaller diameter, thinner case, and flat-head and short pushers, as in this 


SBGB001 (white) 
SBGB003 (black)  
Movement 9R84  
Size 44 x 14



As opposed to the GMT models which are thicker by a couple mm at least.

SBGC001 (Champagne) SS
SBGC003 (Black) SS
SBGC004 (White) Red Gold
SBGC005 (Black) Ti
SBGC007 (Green) SS on Strap
SBGC009 (Black) SS 
SBGC011 (White) SS
SBGC013 (Blue) Ti
Movement 9R86  
Size 44 x 16.5





The Ceramic encased models are same thickness but several mm larger in diameter (the main reason I never bought one).

SBGC015 (Black) Ti/Ceramic
SBGC017 (Green) Ti/ Ceramic
Movement 9R96  
Size 46.4 x 16.5





A multitude of other models have ensued since this list, but it gives you the sense that bigger is better with GS Spring Drive Chronos.

Mike

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Available on the marketplace

617 Grand Seiko listings are live on the eBay market and 47 collector listings on the WatchProSite marketplace.

Grand Seiko SBGC001 with Box  from Isetan  One Owner
5,005 USD
Pre-owned - Good · JP
View all Grand Seiko on the marketplace → SEIKO GRAND SEIKO SBGC001/9R86-0AA0 43mm SS Silver #C3450
4,679 USD
Pre-owned - Good · JP
Seiko Grand Seiko SBGC001/9R86-0AA0 43mm SS Silver Dial Automatic Watch #C3450
4,671 USD
Pre-owned - Good · JP
SEIKO GRAND SEIKO SBGC001/9R86-0AA0 43mm SS Silver #C3793
4,387 USD
Pre-owned - Good · JP