New answers tagged piece-information
Yes. There is. I have a few. They are really bad for connecting to things. Like, BanBao bad. I can't really use them for anything. But they do have the blobs. So yes, there are those, and they are rare, for the same reason the "Pat Pending" ones are rare, mostly the age, and short transition period.
I got my R2D2 at launch in 2012 for the May the 4th celebrations through the Dutch Lego@home web shop. This set contains the old 3307 part.
I cannot give you the definite answer, but LEGO changed the design of the "Brick, Arch 1 x 6 x 2" two times over the last 6 years. The original version is 3307 which was in production/circulation until 2014. It then produced 12939 which entered production/circulation in 2010 and is still out there in new sets, however, in 2014 LEGO started producing yet ...
You can piece together a 16x16 black plate in two layers, by making a base layer consisting of 3867 - Baseplate 16 x 16 (not available in black, but Dark Bluish Gray is a good option and given the minimal thickness it won't show) and then putting 4 of 41539 - Plate 8 x 8 in Black on top side-by-side.
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