I picked up this beautiful 1970 Bulova. It is square at 28MM x 34.5mm and an awesome champagne color bark textured dial which is marked BULOVA with SWISS and gold applied stick markers. Both the 11BLL movement and case back is marked N0. The serial number has a counterstapped BS in front of it. I am not sure if the bracelet is original but it works. It is yellow gold plated. I've checked all the ads and cannot seem to find a match.
In reply to I've come back to this on by Geoff Baker
I call these 'Throwback' models because they look out of place for the date they were manufactured, and I think that's what Bulova was going for here.
I suspect we will find an advert that shows a series of these 'Vintage style' watches with a proper name.
For now, Unknown.