Bill Wyman played a Dan Armstrong · Ampeg bass. Here in these 1969-1970 photos, and seen better in the enlarged view, you might notice that he has moved the location of the strap peg down to the lower horn.

By the mid to late 1970's Bill had migrated from the heavier acrylic bass to the Dan Armstrong 'London' series bass. Here he can be seen playing a 342 short scale bass. Notice the newer type body styling - though with the words 'London' still on the headstock. Here again he has moved the location of the strap peg down to the lower horn.

Black and white images taken at the same booking as above. Notice the Ampeg amps behind him. Here one can easily see the strap pegs in the lower horn.

One can only guess what those devices are on the Ampeg head behind him but the antenna would seem to suggest some form of early wireless unit.

Back in 1969 or 1970. Seen better in enlarged view, notice that the lower horn has the strap peg. Apparently for this engagement Keith swapped out his Dan Armstrong · Ampeg guitar for a Gibson Les Paul.®