The model 459 holster first appears in Heiser's number 50 catalog which I believe is their first post WW II catalog.The description says "F.B.I. Holster designed for Federal Bureau of Investigation." The holster's predecessor,the model 457 first appeared in the number 32 catalog,sometime in the mid 1930's,also "designed for the F.B. I." The model 457 is the same holster without the hammer protector.Again,thanks for showing us your revolver & holster.
Regards,
John Witty
turnerriver
SWCA # 1426

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