Remington US Navy 1867 Rolling block carbine, cal 56 Spencer rimfire

Remington US Navy 1867 Rolling block carbine, cal 56 Spencer rimfire. Two line adress with 1866 date, is alll readable.  deep rifling showing light psots, works fine. Stock is super, serial 1233 on stock and inspectormark.  These carbines (20 inch barrel) were sold to severla countries and were made in a multitude of calibers.  don't know where this one went to.
Barrel retaining 98 % of an old reblue. Works fine.