Nice watch !
Goldammer is a reputable dealer who is also on Instagram and here ;
Classic Vintage Watches – Goldammer Vintage Watches
This "shark fin" model cal 89 is often listed as 37mm, but i think without the crown it is just under so 36,7 mm. It has one of the nicest Italic script logo`s of the era, and from the C24 pictures i say it is correct - unless it is a completely new pad printed dial. Several others can be found by google search from Menta and other sellers so you can compare the pictures. Good Hunting !
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