Im curious to see the gimmick because a friend and I have been doing this impromtu
for the past 6yr.
it has the guy that had shown us said he found it in an old linking ring.I was just going to say that I thought this effect had been around a while and didn't need any kind of gaff. . . then again, that particular company isn't known for accurate research and giving credit where due
i would like to assure that i didnt skimp on the research. i talked to multiple sources and magicians about this effect and looked around myself in many books. i credited all that i could that have done work on this particular coin in bottle.