A rare Casascius physical bitcoin has been redeemed onchain, unlocking 25 BTC from one of the most recognizable collectible formats in Bitcoin history. The redeemed coin was identified as an S1-COIN-25, a 25 BTC face-value Casascius piece from the 2011-2013 mint. The sweep moved 25.0000 BTC from address 1Q53xMg9HpzG5MTd41HzocEj3DDeVhEyFW, with the transaction recorded in block 952534 under TXID fa503e474359a8c22f4199ecc0f3432b36867d517e8ade9b5ddf9474e46cce64.