Single bar above the pivot wheel, basket for the amp to sit in with flat rectangular (rather than bar) sides and small uprights to keep the amp in place.

Note the small spur (one of two) on the top bar of the trolley. These also figure on the trolleys made for The Beatles' early AC50s - see the detail below. They are absent, however, from repro trolleys.

Detail from a pic. from the photo session at Abbey Road with Jimmy Nicol shortly before the European tour of June 1964.

The Beatles on stage at Blokker, Holland, 6th June, 1964.

Mark 2 - Type 2 - large box speaker cab

Single bar above the pivot wheel, basket for the amp to sit in with rectangular (rather than bar) sides and small uprights to keep the amp in place.

The Beatles on stage at the Johanneshov Isstadion, Stockholm, 28th July 1964. And Vox amps lined up as prizes for a Granada TV competition in late September 1964. The two AC50 super twins have trolleys similar if not identical to the ones The Beatles briefly had.

Experimental - patented in August 1964, but not put into production

There is a further picture on this page.

Mark 3 - Type 3 - large box speaker cab

Double bars above the pivot wheel, a "basket" on top for the amp to sit in. Two examples of this format are known to survive.

Gene Vincent and The Londoners on stage at the Empire Pool, Wembley, 20th November 1964.

Tony Hicks of The Hollies in Studio 3, unknown date in 1964.

Mark 4 - Type 4 - large box speaker cab

Double bars above the pivot wheel, parallel bars across the top of the cab for the amp to sit on. This became the standard type of trolley from early 1965 through to 1967.

The Hollies on stage in early 1965. Note the parallel bars (no basket) and the ball, rather than wheel, casters.

Above, the first advert for the new AC50 super twin in "Beat Instrumental" magazine, the main outlet for Vox adverts in the early to mid 1960s. The ad. appears in the issue for November 1965.