Here’s what we know:
There is an Lectrolab model R100C, probably produced in the early/mid sixties. That indicates, with some certainty, that there was a R100, and a R100B (see Bill T’s comment bottom of page), but no visual evidence of those first two models has been found yet. If you have one, let me know!
Some Lectrolab amps were produced with no model number on them, perhaps the R100/R100B are like that. Who knows?
These R100C photos were found on a Brazilian auction site. The tubes are described as 1-12AU6; 1-50C5; 1-35W4, and it is reported to be 11-1/2″H, 12-3/4″ W, 7-1/8″D.
Lectrolab R200 from 1953? This is what the author titles the video, but amends that in the comment sections to say he thinks it’s a R100B (comment is in German). That makes a lot more sense given the cabinet style, and the fact that all other examples of Lectrolab R200’s look nothing like this. So perhaps this is the earliest Lectrolab found so far? Sounds great to me.
Here’s a description of an amp that looked like the one in the video above, from http://www.bazaar-world.com/guitar-amp-1416-Lectrolab-Tube-Guitar-Amp-1950-s-Very-Cool-Amp (sold in 2007):
“Lectrolab Tube Guitar Amp… Electronics look to be 100% original. Nothing looks to have been replaced, with the possible exception of the AC plug end. Single-ended amp has one 6SQ7 preamp tube, one 6V6 power tube, and one 5Y3 rectifier tube. All tubes are RCA brand. Alnico speaker. Amp is in good working order.”
Here’s one on eBay from August 2010: