Stuhrling ST-90050 Automatic Watch Movement

Stuhrling Caliber ST-90050

Stuhrling ST-90050 Automatic Watch Movement

Brand Stuhrling
Caliber Number ST-90050
Base Caliber Hangzhou 2189 (please comment below)
Movement Type Automatic
Size 12”’ (27.40mm) x 4.74mm thick
Jewels 20
Shock System (add to comments below)
Beats Per Hour 21,600 vph
Power Reserve
36 hours
Hacking Yes
Hand-Wind Yes
Functions Hours, minutes, central seconds
Country of Manufacture China
Known Models
Zeppelin Nitro Skeleton


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7 years ago

Is this not caliber HZ9189?

7 years ago

Would like to remove stem,take out complication and clean crystal.Need to clean it.I cannot locate stem removal button.Nothing obvious but am overlooking what should be obvious.The watch is Sturhling Apocalypse Movement ST90089.

5 years ago

This is a great movement. I’ve had it in a Stuhrling that I bought about 5 years ago and it’s still running great and keeps accurate time. I’ve had several other Chinese movements and they usually don’t last past one year and then need to be serviced.

Anthony Moser
Anthony Moser
4 years ago

This is definitely NOT the Hangzhou 2189, since that is an engraved skeleton movement with a different balance arm. It looks more like some variation of a Tongji automatic movement.

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4 years ago

[…] Delphi 730.02 is powered by the ST-90050 caliber, a 20-jewel automatic movement. This gives the timepiece a relatively reliable movement for […]

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2 years ago

[…] mechanical caliber are visible from both sides, giving insight into the movement’s complexity. The caliber originates from China, is decently precise, and has a 36-hour power […]

Leonil Pepingco
Leonil Pepingco
1 year ago

I have a Stuhrling watch that has this movement, but there is definitely no hacking on mine. Is there a way to check this? The page here says it has hacking, so either my movement is mislabeled, or this page needs to be updated.

4 months ago

From my research, the base calibre appears to be one of the 2650 Chinese Standard Automatic Movements (PTS): 2650SSZ. It’s 20 jewels and non-hacking. Stuhrling blued the screws and added some minor engraving.

Venus Caliber 178

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