My thoughts are that this is an International model (not sold in the USA), based on the leading 1- in the serial number and the lack of an import code on the 1966 movement, as well as it states International on the caseback.
I've checked through or international catalogs and I am unable to find a model match. Quite a stunning watch with the 18K case.
Magnificent watch. There are currently 3 if this model (variants) with same dial but plated cases that we have categorized as "Chronograph" generic. They are dated 1965 and 1967. Seen HERE. Like your solid gold model, their s/n's start with a "1 -". I agree that based on case markings, this was likely a product of Switzerland for the non-US market. I'm going to say this is an uncommon one, congrats!
1966 Chronograph.
In reply to Thank you very much for the… by Claudia
The model is a mystery, as we don;t have any references to it. It was likely not named, just a number. The chrome version ad is pictured in the 1967 posting for Chronograph. Movement is a 13??. I can't make out the following 2 letters in the photo. It is under Bulova Watch Co. text in a rectangle.
Stunning watch and in 18KT gold to boot. I agree an international market item. I check the INTL ad listing in the forum and do not see an ID. 1966 Bulova Chronograph gets my vote. I am not sure if we want to be distinguished it as an INTL model like 1966 Bulova International Chronograph.
In reply to Stunning watch and in 18KT… by JimDon5822
You make a good point Jim. The s/n indicates an International model and it clearly is a Chronograph. We have three similar watches in the dB listed as "Chronograph". I think we should update them all. I prefer to list them as Chronograph with the variant "International" as that will make them easier to find when searching for chronographs.