Complex sentence: The newly independent Irish Free State circulated new national coinage in 1928, marked "Saorstát Éireann" (Irish Free State), although British coinage was still acceptable in the Free State at an equal rate.
Split into simpler sentences: The newly independent Irish Free State circulated new national coinage in 1928, marked "Saorstát Éireann" (Irish Free State). British and Irish coinage were mutually acceptable in the Free State at an equal rate.