Coinscope for IDing unknown coins: https://play.google.com/store/apps/details?id=com.miccron.coinoscope&hl=en_US&gl=US
Those are really nice. I am trying to complete my set of Philippine coins, both Pre-Commonwealth and Commonwealth. I got 4 yesterday at the Michigan State Numismatic Society Show, including a nice 1907 peso for $18. Pre-Commonwealth are harder to find.