A Tom Threeperson's design holster, by El Paso Saddlery or any one of many custom holster makers would be a good choice.
Tom Threepersons from EPS for me too.
For my M17 I once had in my small (very small, due to silly German gun laws) collection I had the 1920 El Paso Tom Threepersons, too.
A classic gun asks for a classic style holster.
