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How does the SBGR305 reinterpret the 1960 Grand Seiko?
Grand Seiko frames the SBGR305 as a connection between the pioneering spirit of its 1960 watch and the character of contemporary Grand Seiko. That is the manufacturer’s design interpretation; it does not mean the later watch reproduces the original in every detail. The SBGR305 adds modern specifications and a date display, with an exhibition caseback that reveals its movement.
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In its 2017 product description, Seiko Watch Corporation called it “The modern re-interpretation of the 1960 Grand Seiko” and said it was true to the original design team’s pioneering spirit. Read the manufacturer’s announcement.
What are the SBGR305’s specifications?
| Specification | SBGR305 |
|---|---|
| Movement | Automatic caliber 9S68; 35 jewels |
| Beat rate | 28,800 vibrations per hour |
| Power reserve | 72 hours |
| Accuracy | Static specification of -3 to +5 seconds per day; not an independent test result |
| Case material | Brilliant Hard Titanium |
| Case dimensions | 40.5 mm diameter × 13.6 mm thick |
| Crystal | Dual-curved sapphire with anti-reflective coating |
| Caseback | Screw-down, see-through |
| Water resistance | 10 bar |
| Magnetic resistance | 4,800 A/m |
| Strap and clasp | Crocodile strap; stainless-steel three-fold clasp with push-button release |
These are manufacturer specifications from the 2017 announcement. Water- and magnetic-resistance figures describe the model as specified, not the verified condition of an individual watch now; condition and maintenance matter when assessing a pre-owned example.
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- See-through case back
- Date display
- Screw-down crown
- 40mm Diameter
- Weight 178.0 g
What does the 9S68 movement add?
The automatic 9S68 runs at 28,800 vibrations per hour and has a stated 72-hour power reserve. Grand Seiko also specifies static accuracy of -3 to +5 seconds per day. Those figures are the company’s specifications, not a guarantee that every watch will show the same accuracy in daily use. The manufacturer says the movement allows a larger date window, making the date display part of the SBGR305’s practical update to the earlier design.
How large is it, and what is the case made of?
The titanium case measures 40.5 mm across and 13.6 mm thick. The manufacturer names the material Brilliant Hard Titanium and pairs it with a dual-curved sapphire crystal. These dimensions describe the watch on paper; how it wears also depends on the wearer’s wrist and the strap fit.
Rank #2
- Three-fold clasp with push button release
- Dual-curved sapphire crystal
- Power reserve display on the back
- Power resrve Approx. 72 hours(3 days)
How limited was the SBGR305, and when did it launch?
Seiko Watch Corporation announced the watch on March 23, 2017, as a limited edition of 968 pieces. Its English announcement said it would be available from July 2017; that regional release timing should not be read as a universal date for every market. The production figure does not indicate how many are currently offered for sale.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What did the SBGR305 cost at launch?
The launch figures are historical and come from different regional contexts, so they are not directly comparable or current valuations.
Rank #3
- Featuring a Black Band, Silver-tone Case, Scratch Resistant Hardlex Crystal
- Box-shaped Hardlex crystal
- Second hand halt mechanism (Hacking)
| Source and context | Reported launch-era figure |
|---|---|
| Seiko Watch Corporation, approximate European recommended retail price, 2017 | €8,800 |
| Hodinkee, launch introduction, 2017 | $7,200 |
Hodinkee’s 2017 launch introduction supplies the dollar figure. Neither launch price establishes today’s asking price or resale value.
Is the SBGR305 still available?
The edition was limited to 968 pieces, but that number does not establish present-day stock. The 2017 announcement and launch coverage do not verify current inventory, resale pricing, seller identity, or the condition and provenance of any particular watch. If you find an example, assess those details individually rather than treating a historical launch price or the edition count as evidence of its current value.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
