In the post-war era Foreign Exchange controls meant that dollar imports were both scarce and expensive in England. If you wanted a K-22 the Treasury probably wouldn't let you send the dollars out of the country so converted war surplus revolvers were an alternative. Parker-Hale did a variety of ones in .22 and (later) .38 Sp when .38 S&W production here dried up.



I well recall that a bunch of these revolvers were issued to the cadets from the Public Schools for their meeting in July every year. It was about the most dangerous place on the camp with revolvers being waved in all sorts of unsafe directions. Yours appears to be one of the ones with the semi-flange around the chambers - ones without this tended to have the fired cases back out and freeze rotation.