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Someone know which Seagull caliber is this?


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Hi everyone! I bought an Aeromatic 1912 A1308 watch (have not received it yet) and I was wondering what caliber does it use. By chance I found the attached pictures, I believe it's the same caliber but I found no information on it, only that it may be a Seagull. Can somebody help?seagull_front.thumb.png.f35c1d1cc8f7202741f13e5c7ccbb239.png

Thank you!!

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