[Antennas] Heavy duty antenna mobile quick disconnect??

[Ray LaRue]

7 or 8 years ago at an unremembered hamfest, I bought a very heavy duty, all
brass antenna quick disconnect, from a small dealer.  It was twice as heavy
duty as anything I see on the market today and great for large mobile HF
antennas.   I would like to buy another one but have no information on the
original manufacturer, or the dealer.   It utilized a nice large knurled
ring nut, for locking it down.

Does anyone on the list recognize this disconnect and can suggest where I
can purchase another?

Your attention is appreciated,

73,
Ray, W4BYG
Naples, FL