[kingu]

Simple solution: paper ballots

We had those before, didn't we? Push a pin through the piece of paper, your vote is recorded? And afterward, your ballots are there to be recounted however many times as desired.. Yes, I'm sure this was done.

[From many - one.]

Actually I was thinking more of using a pen and making a mark. Pins will do as well as pens. No puns, though.