I don’t know definitively. I hadn’t got any from that period, but I wasn’t attending football in the fifties or first half of the sixties, so wouldn’t really know.
If you suggest a specific player, I can research and maybe come up with an estimate.

Top three that I thought of myself and who are verifiable on transfermarkt have 23, 20 and 18 appearances respectively. But they only have reliable figures for currently active players plus those who have retired within the last 10 years or so. I have acouple more from the 70s / 80s, who have likely clocked up 20 or more, but can’t be precise about their numbers. They are estimates.

Plus there are probably more who hadn’t occurred to me until mentioned - e.g. Henderson yesterday.

I’ll post my own best guesses sometime before kickoff tomorrow.