Description

A vintage hatters’ rounding jack brim cutter, complete with its integral rule and clearly marked J. B. MASF CO – NEW YORK, a classic and highly functional tool from the era of traditional hat‑making. This example has the long, elegant wooden body with the built‑in measuring rule along the top edge, used to set and cut perfectly even brims. The iron is properly fitted, the fence adjusts smoothly, and the tool has that warm, honest patina that only comes from decades of careful shop use.

Rounding jacks from J. B. Masf Co. are well regarded among millinery and hat‑shop collectors, and this one has all the right traits: clean markings, a crisp rule, and the sturdy, workmanlike feel of a tool built for precision. A wonderful piece of hatters’ history and a great display item with real functional heritage.

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