Subject:
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Re: Part 3941 vs Part 6143 (Brick 2 x 2 Round)
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Newsgroups:
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lugnet.general, lugnet.db.inv
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Date:
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Sat, 2 Mar 2002 22:14:12 GMT
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Viewed:
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4905 times
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In lugnet.general, Maggie Cambron writes:
> In lugnet.general, Ray Sanders writes:
> > While surfing the peeron database, I noticed that, in 7104 Desert Skiff,
> > 'Brick 2 x 2 Round' is listed as p/n 3941, but noted with 'Number on piece is
> > 6143'. Out of curiosity I pulled a desert skiff and looked at the piece.
> > Indeed, the piece is marked as 6143. So I pulled a few other sets at random,
> > the same piece from '6568 - Drag Race Rally' has no p/n molded under the
> > bottom. The mold series number typeface is slightly larger. A piece from • '7310
> > - Mono Jet' also has the '6143' under the bottom. After careful examination,
> > the only difference between the pieces (apart from the mold number) is the
> > finish on the underside edge. The (apparently) newer parts have a matte
> > finish, while the part from 6568 has a smooth finish.
> >
> > Does anyone actually have a 'Brick 2 x 2 Round' with 3941 molded on it ? If
> > so, are there other differences between that and 6143 ?
>
> I took a look, and while I can't even find the same numbers you're talking
> about on most of those elements, I finally found an older yellow 3941 and • newer
> blue 6143-- and I notice there are two distinct versions of these bricks. I
> scanned a white one of each so you can take a look at the difference (which is
> seems to make no difference AFAICT on holding power).
>
> http://www.brickshelf.com/cgi-bin/gallery.cgi?f=12894
>
> The white 2x2 brick on the left is from 1352 Explosion Studio and so is pretty
> new. The white 2x2 brick on the right is from a batch of older LEGO I got • from
> a garage sale (the batch seemed roughly pre-1990). Notice how the inner part
> of the bottom edges are straight on the older one but curved on the newer one.
> Curiously though, the grey 2x2 plate I have scanned in the middle is also • from
> 1352, but it has the older type bottom.
>
> Also, while my sorted 2x2 round bricks from new sets are all of the curved
> bottom type, my collection of older used ones is a mixture of both types. And
> I notice that BrickLink only uses PN 3941.
>
> > Also, it seems slightly curious that 3941 and 6143 bear some similarities if
> > two of the digits were flipped vertical (although that explanation is • probably
> > stretching it a bit).
>
> I didn't find the part numbers on most of the bricks I looked at (which is why
> I scanned the white ones-- I hadn't found the blue and yellow ones at the
> time).
>
> Maggie C.
This was discussed in some detail a while back in lugnet.cad
http://news.lugnet.com/cad/dev/org/ldraw/?n=1639 and replies
Chris
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