This is Diane's current speculation about the genesis of 2-2-V-1, assuming it is in fact the window patch.
OK, let me be Bo, her mechanic, for a minute.
To the Karl Volter people I'm just some stranger surrounded by a bunch of VIPs, and they aren't going to let me root around blindly in their shop. So they have assigned some guy from their maintenance department to hang out with me and assist.
This mechanic is able to provide a clean new sheet of .032 Alclad, and most curiously, some thicker reinforcing strips with pre-drilled 3/32 holes at precise one-inch spacing.
As Bo, I could have made such things on the bench, and with the precision enabled by a drill-press and table made them quite accurately, but more likely they were pre-made, probably in a factory, and were laying around in Volter's inventory from some other job. It's entirely possible they were not even aircraft parts.
I, Bo, have the airplane right here with me, from which to take precisely accurate measurements. At the workbench I cut the patch's shape out of the sheet of raw Alclad. I lay a narrow strip of aluminum as a vertical reinforcement, and trap it under the four rows of horizontal reinforcements. The rivet spacing is precise because I'm able to drill the Alclad sheet through the pre-drilled holes in the strips. I rivet the strips down, and then use brute force to bend the piece into an approximation of the fuselage shape.
Now the guy and I go rivet the pre-assembled window patch into place on the airframe. There is no need, and we make no attempt, to align the vertical reinforcement with the ring former. One of us holds the patch in place from the outside, and the other guy drills through an existing rivet hole in the airframe into and through the patch, and we hold it in place with a Cleco, and then do the same with all the other rivet holes. We get it into position with the Clecos, and then rivet and buck the patch into permanent place, and go fill out the paperwork. Total billable time about two hours.
And this simple flat piece of .032 aluminum sheet passes through Nikumaroro to end up in TIGHAR's collection, with all these people fascinated about it. I'm one of them.