Bulova "Snorkel" "Devil Diver" recased?

Hello,
I recently picked up a Bulova that looked like a Snorkel or Devil Diver and I am trying to determine if it has been recased. Has anyone seen one similar to this without a rotating bezel?
I know that there were several variations in the Bulova and Caravelle divers. I've always liked the looks of these. Some said Snorkel and some did not, and some had depth ratings and others did not but all seemed to be housed in a case with a rotatable bezel similar in looks to a Zodiac Sea Wolf. I have looked at several Bulova advertisements from their 1960's lineup and @Jwit helpfully pointed me to the website mybulova with many example photographs. I did not see one similar to this. I ask as my case is period correct. The case and movement are stamped M5. This is the Bulova date code for 1965 and the case has an inscription of 12-25-65.

Perhaps @SATAN has seen this devil diver?

Even if it has been recased the price was too good to pass up. I would like to keep it original if it is correct. If it has been recased then I have located a Snorkel dive case with bezel and I will swap it out.

Thank you all for your time!

Update if anyone is interested:
I have located another Bulova example on eBay with the same case also dated M5 1965 so I think mine is original and has not been recased.

Thank you!

@X350 XJR Thank you for posting another example. It is interesting to see a "white" dialed version of this dial and in a different nondiver case than mine.