No guru but I would rank them opposite your ranking, primarily due to scarcity. Myres made a lot of holsters but not as many as Heiser, who didn't make as many as Lawrence (a quick eBay search confirms, the current numbers respectively: 12, 70, 126), thus Myres survivors will be harder to find. I also believe Myres' best work is equal to, if a not a cut above, both Heiser and Lawrence.

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SWHF #448