First off, Craig, welcome to the forum. The photos are appreciated.

A very late production Victory in its British Service Revolver configuration. The proofing indicates release to the civilian market by the British government. In the post WWII years, these were often refinished either in blue (like yours) or nickel, and frequently had the chambers reamed to accept the .38 Special round as well, before being exported to the U.S. The grips as you surmise are also not original.

This may be a passable shooter, but its historical and collectible value is now minimal. One thing to check is whether both a .38 S&W round and a .38 Special round will chamber. If you find that to be so, you'd be well advised to stick to the former, as .38 Special casings may bulge and even rupture if used in a gun so modified.

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SWCA #590
"Colligo ergo sum"