Some images of bands with early large box AC50s are available in the meantime at the end of the introduction page.
Gene Vincent and the Londoners 17th October 1964
Note the early style of trolley - the amp sits in a basket, rather than on parallel bars.
Bill Hailey, Paris, Alhambra, 1966
Images originally posted here. The Spencer Davis Group were on the same bill, but the SDG normally used Marshalls.
Herman's Hermits, 1966
Their AC50s atop AC100 trolleys.
Gerry and the Pacemakers, 1964/1965
A Vox promotional picture.
The Pussycats, 1966
A combination of AC50s and MAX cabs. Note that the AC50s are probably early, valve rectified: white warning plaques; rectangular Cannon XLRs, apparently on a black plate; hard wired mains cable. See this page.