This is an auction for a New Switchcraft Model # S250, 0.206" Male Cable Mount Plug.

This connector is a commercial TS (Tip, Sleeve) Mono plug. made by Switchcraft, not an overseas import.

Features:

Male 0.206" Audio Plug
Solder Termination
For use in commercial and some aircraft radio applications
Mates with Switchcraft Number S128 Extension Jax® and S11 Littel Jax® jacks and others
Materials: Body, Tip & Sleeve ~ Nickel Plated Brass; Handle ~ Nylon; Dielectric Insulator ~ Phenolic; Terminals ~ Tin Plated Brass

What Switchcraft says:

For applications requiring polarization (use of plugs of different sizes)
to prevent insertion of incorrect equipment Littel-Plug® phone plugs featuring a sleeve and tip diameter of .206 inches are available. Mate with Number S128 Extension Jax® and S11 Littel Jax® jacks.