When I had my first DB I hadn't seen a BG - anywhere. Johnny Hawksworth was the bass player with the Ted Heath Orchestra and he had a contact mic going into a custom made amp from Teddy Wallace. About 1963. I didn't like the contact mic sound so tried a Reslo ribbon mike looking straight at the G f-hole about 4" away. I used a Leak 50 watt hifi amp chassis (twin KT88s) and my young brother who was a bit of a genius made me a one valve preamp. Speaker? I started out with a Goodmans 12" speaker and made an enclosure for it, later 'upgrading' to an 18". The cabinet was so huge that we put a door in the back and the band suits used to travel in it like a wardrobe (closet?). I was playing behind a great female tenor player of the day, Cathy Stobart, and had a loose joint in the preamp so I had a lot of clicks and buzzes. She broke off from her solo and enquired whether i thought I was playing a gieger counter.
I noticed that the DB players stayed with the contact mic but the Ampeg B15 became the amp of choice. I couldn't possibly afford one - still at school. Later the DBs almost became extinct with the arrival of the Fender bass guitar. First group I saw with one was the John Barry Seven. He played trumpet in those days.
Sorry to go on so much and hope that some of these names are recognisable over there.