Dial does look like a Lady Maxim
I would add that this movement is identical to the "AS 694" Swiss movement!
This watch would be the "Lady Maxim" maybe 1921!
My feeling is no triangle, trick of the camera. BUT I could be wrong.
Start date from what looks like a triangle? Can that be right for this movement?? Dial from opposite side shown to aid in dating- if it's even original to the movement.