Grand Seiko · Heritage Collection and Heritage Collection

Grand Seiko SBGA211 vs Grand Seiko SBGA413

9 published specifications differ between these two, and 8 are identical. Every figure below is what the manufacturer states for that reference; nothing is inferred from the other watch.

What differs

Specification	Grand Seiko Automatic Spring Drive 3-Day, High-Intensity TitaniumSBGA211	Grand Seiko Automatic Spring Drive 3-Day, 62GS case, Hana-Ikada dialSBGA413
Case	High-Intensity Titanium, 41.0 mm. Grand Seiko describes the case and bracelet as High-Intensity Titanium, about 30 percent lighter than stainless steel	High-Intensity Titanium, 40.0 mm, described as a reborn 62GS design
Diameter	41 mm	40 mm
Thickness	12.5 mm	12.8 mm
Lug to lug	49 mm	47 mm
Lug width	20 mm	21 mm
Crystal	Dual-curved sapphire crystal, anti-reflective coating on inner surface	Box shaped sapphire crystal, anti-reflective coating on inner surface
Dial	Described as inspired by snow formations on the Hotaka mountains, produced by a special silver-plating process rather than painted white	Described as inspired by Hana-Ikada, spring cherry blossoms floating on a river
Bracelet	High-Intensity Titanium, 20 mm band width, 193 mm band perimeter	21 mm band width, 202 mm band perimeter
Movement notes	Stated accuracy ±15 seconds per month (±1 second per day). Power reserve indicator on the dial. Blue tempered steel seconds hand with the Spring Drive glide motion. Listed as allergy-safe metal. Total weight 100 g.	Stated accuracy ±15 seconds per month (±1 second per day). Power reserve indicator. Listed as allergy-safe metal. Total weight 102 g.

What is identical

Worth knowing as much as the differences: these are the specifications you cannot use to tell the two apart.

Water resistance: 10 bar
Case back: See-through and screw case back
Crown: Screw-down
Clasp: Folding clasp with push button release
Calibre: 9R65
Movement: Spring Drive, self-winding with manual-winding
Power reserve: Approximately 72 hours (3 days)
Jewels: 30

What the differences cost you

Each note below follows from the published figures in the tables above — what they mean for intake, for a listing, and for the handover. Nothing here estimates a price or a margin.

One of these is the harder fit

Lug to lug is 49 mm on the SBGA211 against 47 mm on the SBGA413 — a 2 mm difference across the wrist. Diameter is what buyers ask about; lug to lug is what decides whether a case sits flat or overhangs. Ask for a wrist measurement before shipping the SBGA211, and put the figure in the listing rather than the diameter alone.

What to check on each

SBGA211

Watch the seconds hand for ten unbroken seconds. Spring Drive does not tick — the hand sweeps continuously, and any stutter or jump means something is wrong that no photograph would have shown you.
Wind it fully, note the reserve indicator's position, then leave it face up overnight and read the indicator again. It should have fallen by roughly a third of its range, and a much faster fall is a real finding.
Run a fingernail across the titanium case flanks. Titanium marks differently from steel — it scuffs greyer and shallower — so judge the finish on its own terms rather than against a steel bracelet you handled last week.

SBGA413

Check the reference number against the case dimensions before you list it. Two titanium Spring Drive watches in this collection share the 9R65 and differ by a millimetre of diameter, so the movement tells you nothing about which one you have.
Inspect the box crystal's raised edge under raking light for flakes. A squared sapphire profile on a titanium case gives the glass no protection from a knock the case would otherwise take.
Confirm the band perimeter suits the buyer. Grand Seiko states 202 mm here, which is generous, and a bracelet sized for a large wrist may need links the seller no longer has.

Sources

Not affiliated with Grand Seiko. Specifications are read from each manufacturer's own published documentation on the dates shown and may change; the manufacturer's current documentation governs.