The dial looks original to my eyes, but I've never seen this particular design without the 'Swiss' mark at the bottom. It could potentially be an exception, but there's also a possibility that it has been cleaned or altered, as part of the 'V' in 'Universal'.
I agree - the dial appears original, but it seems that the "Swiss T" marking may have either been cleaned off or has deteriorated over time. 31 seems to exhibit a similar issue.
looks good from here, but obvously the lack of swiss t is odd. But is it any more or less odd than those dials missing the "tri compax" words? I guess my point is these folks weren't exactly known for their consistency in this era.