These are the sellers pics. I picked this up tonight. Looks to me like a heretofore unseen Diamond Excellency "Variant". It's a perfect match for the round ad we have down to the diamond plating look on the bezel. Now... if that band isn't original it's an absolute perfect match for this watch!
ad is Dated 1968

Close, but subject watch bezel is slightly different. Look at the thickness. Advert seems to show two circular designs, outer and inner. Subject watch only looks to have one.
OR, is the inner circular design part of the crstal, which looks like may not be present on the subejct watch? In which case its the watch but with the wrong crystal.
In reply to Close, but subject watch by mybulova_admin
pics are a little small but the diamond hached crystal is there as well. when I get it I'll take some better pics.
yeah if that's the "A" wonder what the black/WG is?
would agree the ad is showing a 'faceted Crystal' (as described) making the bezel appear wider.
'DIAMOND EXCELLENCY' unknown variant.
Sorry - mised voting on this one.
Diamond Excellency, no variant
diamond excellency from me. unknown veariant for now