Hi Joe,
Glad that was helpful. I'm not sure what you would be accomplishing by heating the watch up for a condensation tests at this point. If you do this, just don't over heat the watch - you should still be able to pick it up without discomfort.
The video suggests warming the watch to 100 degrees F, so that is probably just barely warm to the touch and the drop of water is room temperature, so perhaps a differential of 30 degrees F..
What this tells me, assuming this part of the video is accurate, is that it doesn't require a huge differential in temperature to induce condensation when the air in the watch is not dry air.
The example with the Seiko Prospsex diver was more dramatic, with an ice cube sitting on the face crystal.
I'm not sure I want to deliberately trigger condensation in this particular watch a second time, so I may not actually do the test.
This reminds me of an old electronic fuse-tester joke.
You set up a tester that consists of a fuse holder, a source of AC power and a SPST toggle switch. The switch and the fuse are in series. When you install the fuse, turn on the power and then flip the switch, if the fuse blows, you know it was good.
