The Seagull caliber TY2809 is an affordable skeleton dial automatic watch movement. It is a 3-hander with 21 jewels, made in China.
There are minimal markings on this caliber. No branding is found, but there is a country of origin and jewel count laser etched on the far outside of the rotor. AAA is also laser etched there.
The example pictured was found in this Android (Aragon) Bioluminescence watch.
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