I remember watching David Roth on VHS back in the day. He was my introduction to coin magic and I was blown away by all of his different approaches. I learned They Both Go Across when I was 14 and it has served me well ever since. It's quick, can be done with any coins and is a perfect little gem for when you are out at a restaurant etc. Have fun with it!

MJM Magic https://www.mjmmagic.com/store/-p-27617.html

The Magic Box https://www.stmagicbox.com/products/the-......o-across

Be Amazing Magic Shop http://columbusmagicshop.com/product/the......ownload/

Hocus Pocus https://www.hocus-pocus.com/magicshop/index.cfm?p=51579

They Both Go Across is taught on Reel Magic Issue 27. Reel Magic On-Demand includes this and much more valuable content for only $5/month.

Where was it originally published?

I don't know if Apocalypse Vol. 4, No. 1 Jan 1981 is where it was originally published but it's there.

I looked for it in his "coin magic" book but didn't see it in there.