When was Wisner Tech Field 4x5 #941 built?

This is an older thread but I will add another point of reference to dating a Wisner Technical Field.

I bought a Wisner Technical Field serial #375 from Lee in 2006/2007. It had the solid brass tripod plate with both 1/4" and 3/8" threaded openings.

I emailed Ron Wisner at the time on dating my camera and received this reply: "Your camera dates from about 1989".

I think #375 dates from the early 1980's but additions to this thread would be welcome to begin adding more Wisner serial numbers and dates.

My Wisner 8x10 Technical Field was number 284 and I took delivery in 1989. This camera built to order direct from Ron.

Anyone have any idea how many Wisner cameras were built and sold per year? And the years of production for the factory and sales?

my Tech Field 4x5 is 1001

The highest number I saw was in the 2000 rang. It was one of the last cameras made.

Two entries...six years apart. Where does the time go? Where has Ron W. gone? I met him when I presented at the LF conference in Albuquerque in 2002 - good times those. Where have they gone?

What I think is needed is a "Large Format Photography Forum" conference...something to bring us together after all of this Covid BS is behind us...so that some of us lowlifes and miscreants could meet, hang out and share our work and our stories before we're six feet under. Anybody with me on this?

941. That seems very familiar. I think I may have once owned that camera. Or it may be a very similar number to the one I had. It was nine-something-one. That sure sounds like it. But I bought mine new in 1994 from the company Charles Farmer had. I forget the name. I sold it some years later. I now have #823 which I bought used about 20 years ago.

so I looked at a Wisner tech field (4x5) today that had a serial number of #004??