There have already been a number of threads on here about various past ticket issuing systems and ticket formats, such as:
INTIS: www.railforums.co.uk/threads/intis-intermediate-ticket-issuing-system.282704
Tickets the size of an airline boarding card (similar to standard SNCF ticket stock): www.railforums.co.uk/threads/ticket-the-size-of-an-airline-boarding-card.251914
Square national rail tickets: www.railforums.co.uk/threads/square-national-rail-tickets.281463
I also recall that for a time in the early to mid 1980s, InterCity tickets were sometimes issued on ticket stock with the same red/orange border still found on standard credit card-sized ticket (CCST) stock today but in a vertical (i.e. portrait) format as opposed to the more usual horizontal or landscape CCST format. On the back it said "Your ticket has been validated to make it good for travel. The abbreviations used mean:" and there was then a list of abbreviations used for the different ticket types. IIRC those tickets were about 7cm across and 12cm top to bottom.
What ticket issuing system was this?
INTIS: www.railforums.co.uk/threads/intis-intermediate-ticket-issuing-system.282704
Tickets the size of an airline boarding card (similar to standard SNCF ticket stock): www.railforums.co.uk/threads/ticket-the-size-of-an-airline-boarding-card.251914
Square national rail tickets: www.railforums.co.uk/threads/square-national-rail-tickets.281463
I also recall that for a time in the early to mid 1980s, InterCity tickets were sometimes issued on ticket stock with the same red/orange border still found on standard credit card-sized ticket (CCST) stock today but in a vertical (i.e. portrait) format as opposed to the more usual horizontal or landscape CCST format. On the back it said "Your ticket has been validated to make it good for travel. The abbreviations used mean:" and there was then a list of abbreviations used for the different ticket types. IIRC those tickets were about 7cm across and 12cm top to bottom.
What ticket issuing system was this?

