Pauldron

Upon the espaulieres are placed pauldrons, also ridged, with the edges turned up, so as to form the prototypes of pass-guards.

[…] a pair of pauldrons with the light horizontal bar which in later years developed into the high neckguard of the sixteenth century; numbers of gauntlets, visors of helmets, and other pieces, the handling of which is a sheer joy […]

[…] the elbow cop or coudiere for the elbow; and the rerebrace or arriere-bras for the upper arm. The shoulder cop, pauldron or epauliere which covered the shoulder, and often a large part of the breast and back, was usually considered a part of the arm guard.

This rim involved a raised rolled edge on the rerebrace that was inserted into a raised lip on the lower lame of the pauldron.