Movement ID Assistance

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Picked up this (I’m guessing) 1940’s to early 50s watch. Normally this brand runs an AS movement, but this one puzzles me. I find no markings to indicate AS, but it could be an unmarked AS movement I’m unfamiliar with. Doesn’t really strike me as ETA or FMH either but I’m certainly not an expert. Any ideas? Thanks in advance!
 
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Could also be A Schild 1194. Virtually the same movement, but a bit larger in diameter.
 
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Good workhorse movement. I use these for practice. They were used in a lot of brands. Come in a lot of grades. Easy to work on. If my mentor was right properly maintaned, they could last 500 years.

As @Canuck noted, The OD can vary depending on the case since these were often ordered in the raw and cased by the house name. I have some what have different calibers stamped others which have no marking. The wheels and bridges are interchangable.
 
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AS 1187 gets my vote as well, the layout matches what Jim posted from Ranfft. Nice pickup those unmarked ones can be confusing until you see the bridge shapes.
 
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Thanks all. Small dial but period correct at 33-34mm. It’s running, but sluggishly so. I’ll have to find someone to service it. Bright note, the dial seems pretty pristine. All of the blemishes are on the plexi.