Post Your Scalloped Edge Coins! - Coin Community Forum
Flat-sided coins seem to be standard across the world for exchanging small denominations of precious metal currency. Were other designs, like spherical or triangular coins, ever tried? - Quora
Australian Silver One Dollar "Five Kangaroos Scalloped" 2004 | coinscatalog.NET
50c 1988 Error Scalloped Edge nUNC – M.R.Roberts - Wynyard Coin Centre
Custom Edges and Shapes for Challenge Coins | MilitaryCoinsUSA.com