Sellmansberger-Houser #1A (32.3mm) Stainless Steel Tuba Mouthpiece Screw Rims

Description

I am selling my two Sellmansberger-Houser #2A 32.3mm stainless steel screw rims, designed for the older-style two-piece Sellmansberger mouthpieces ("Blokepieces"). Both are in excellent condition and have slight scuffing but no scratches.
Bothe have exactly the same rim contour--namely, the Sellmansberger #1A "Semi Flat" 32.3mm rim--but differ in the stamp markings and in rim-cup interface design:
The rim on the left in the pictures has the basic flat rim-cup junction. The rim is stamped, “SELLMANSBERGER No.1A Semi Flat 32.3MM HOUSER MPC.”
The rim on the right in the pictures, is a newer style with an added 1/16” skirt at the rim-cup junction. The skirt is cosmetic only, and was apparently intended to cover up the junction.  This rim is stamped, “No. 1A 32.3MM Semi Flat  HOUSER MPC. WORKS.”
Both are for sale. First buyer gets their pick.