John probably will know. I just scored a couple old ones. Got a call from a friend at my wood working club and someone donated a few kits and a bunch of balsa wood plus a lot of items I could really use. The bottom one said it was for a two channel so I figured what the heck, I have some new 1/2A engines and small servos. When I opened the kit all it had was some wing ribs and nothing else worth mentioning. The top one is a complete kit. On the plans the date is usually printed, in my case it was 1942 as I recall. No die cut parts at all, just silk screened wood. Very old school but I built a ton of them that way when I first started modeling. Not really into free flight at all these days so I may take it out to the lake bed with me and donate it to the free flight club for part of there raffle.