(2021-04-17, 12:37)Philippe Hurbain Wrote: I discussed this problem with JC Tchang, who has no clue whether its a single dual sided part or two different ones. If you know for sure that it's a dual sided part then a new uxxx part should be created and u8013 / u8014 be obsoletized.
As quoted and translated from this page https://jc-tchang.philohome.com/histoire/abb.htm :
Gotcha. I was just about to explain how I was quite sure they were two-sided, even though I have never seen one in person, and couldn't find any videos of somebody actually turning one over…and then I stumbled across this: https://flic.kr/p/2k8ygzm (and also https://flic.kr/p/253vnfn )
Other than that, I've been really scouring the historic literature lately, and it all refers to these early 700B windows and doors coming in 3 window styles and just one door style. And retailer price lists of the period always show the numbering as 700B/1 through 700B/3 for the windows, and 700B/4 for the door. But seeing them molded transparent pretty much settles it for me—I'm glad I just happened to find that!
I have the two-sided part already made up, so it's just a question of the number. u8040 seems to be the next available in the series.