This model has caused us many discussions as to its name. Here's a good lengthy discussion we had on this model which in the end we determined the best model name was a Bruce 'B" based on the mount and in particular the lack on a expansion/leather combo strap that was the correct mount for the Cadet "B", which we rulled out, leaving the Bruce "B".
1947 Bulova Bruce "B" is my ID.
Here's how we determined that:
All rose/coral gold, non-engraved versions.
1941+42+43 showing The Lieutenant on leather band
1942 advert with Ranger on bracelet
1942 advert with Cadet on expanding bracelet
1943 advert with Lieutenant on leather band
1943+44 showing Cadet "B" on expansion bracelet/leather combo
(ad has watches around the wrong way)
1946 adverts showing as Bruce "B" on expanding bracelet
1946 adverts showing Cadet "B" on expansion bracelet/leather combo
1947 advert with Bruce "B" on an expansion bracelet.
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1941+42+43 + expanding bracelet = Cadet
1941+42+43 + leather band = Lieutenant
1942+43 + bracelet = Ranger
1946-49 + expanding bracelet/ leather combo = Cadet
1946-47 + expanding bracelet = Bruce
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Bruce "B" would be my call.