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The picture is of MS tubing.
The ebay seller is saying that the frame is multi shape, whether it is MS is another question :)
SideshowBob-
You mean Multi Shape, not multi shape. :0
Roberts were fond of mixing up the tubes, so the odds are that it wasn't built from just one set.
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It‘s Max Tubing, not MS. I‘m not sure about the seatstays and the forks are definitely not max but the rest is max. Lugged max frames also use a proprietary bb, similar to the MS one. MS has assymetrical chainstays and a teardrop-shaped downtube whereas max chainstays have the same shape and the downtube is ovalised.
MS bb shell, note the assymetric chainstays shapes:
Max BB:
@Scilly.Suffolk true, mix and match was common but with lugged MS and Max frames, the dt and chainstays had to be from the same tubeset due to the proprietary bb shell. it was fairly common to use other seatstays for example. My cyfac max and the merckx mxl use round non-max seatstays for example.
Scilly.Suffolk
Sig_Arlecchino
Got it! It's got lugs integrated of course..
@SideshowBob that doesn't look anything like the tubing on that Roberts.