Just wondering the name of the watch and if anyone knows how to find a crystal replacement or what I should be looking for that would be great. Thanks
Once you ID the model you can find vintage New crystals on Ebay but it is a bit of a search for the correct one. I'm in the process myself.
Always ask qustions of the seller before buying too. This way you can be sure you are dealing with a good retailer.
Navigator

If you are able to measure the crystal that may help us determine a replacement model.
B*B MX203 178 * PM MyBulova member DarHin for the correct Glass.
PA Watch Hunter, can you provide crystal dimensions? Also, does the bottom of the crystal (where it mates to the case), curve from side to side and from top to bottom or is it flat from side to side and curved from top to bottom?
Mark, is that supposed to be the BB MX2037 178?
I'm not seeing the "Navigator" in any of my catalogs for this era BTW.
Thanks
In reply to PA Watch Hunter, can you by DarHin
Hi sorry it took so long for me to get back to you, The crystal measures 18X20mm and it is curved. Any info on where I could find a replacement would be great. Thank!
In reply to Hi sorry it took so long for by PA_Watch_Hunter
Its curved on the side and looks to be flat on the bottom.
In reply to PA Watch Hunter, can you by DarHin
Hi sorry it took so long for me to get back to you, The crystal measures 18X20mm and it is curved. Any info on where I could find a replacement would be great. Thank!
the December 1944 Navigator ad sure seems to be a match. I doubt this watch was called something else in 1941. Thanks for checking the crystals PA, Fifth and Darhin.
Hopefully PA Watch Hunter can confirm crystal specs/dimensions. I'm good with 1941 Navigator based on ad. Movement asterisk and case serial number both 1941. Nice watch.
Hey Will,
I wasn't making a judgement on the Navigator id, just pointing out that my catalogs are no help in finding the correct crystal.
Darren, Just checking an example I have which looks like the subject Watch but is Dated 1948: The MX 2037 178 is a little wide with the bezel opening measuring 20.3 x 17.8, curved in one direction only. (always best for the Watch owner to measure) Is the 'NAVIGATOR' ad showing flat bezel horizontals or rounded as on the subject?