For Honda 1600 (and any others interested), I have found some aircraft photos, taken at CB in 1956; one shows a member of Birkett's Air Services, standing in front of Chipmunk WP922. Unfortunately, I cannot remember his name, but if Honda 1600 would care to pm me via the forum moderator with his e-mail address, I will gladly e-mail copies of the photos; the forum's 192kb limit prevents me from posting them here.
Euan MacKenzie