Doesn't look right to me- but the pre-1960s models are always more risky because they are less well-known. I never feel that confident positively confirming authenticity on these. To be fair, there are similar models from this era with the arabic numerals

 

Black dial though in that era was quite uncommon for any brand, and with a snapback case and square non-dustproof unsealed pushers, I'd be extremely sceptical about the originality of that dial.