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Seat tube stamped or just a dent?

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Seat tube stamped or just a dent?

Old 04-06-20, 08:13 AM
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daviddavieboy 
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Seat tube stamped or just a dent?

For good or bad I was very bored (too much for my own good) and decided it was time to refinish an old Moser. Any way as I stripped the paint off the seat tube and got to a dent I always knew was there, it looked a little strange to me. It has been there for the years I have had it and I always assumed it was from the front derailleur clamp. With the paint removed it looks like it was stamped and not a dent to me, possibly to place a derailleur braze on? Looking for other opinions as if it is a dent I will fill it prior to powder coating. Also what are the thoughts on the cable guide. They look a little ratty to me and thinking of changing to internal.

The bike is a Moser supersprint either 84'or 85'


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Old 04-06-20, 08:39 AM
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It looks like a stamp from the factory to me...could be for a FD braze-on as you suspect.
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Old 04-06-20, 09:40 AM
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I've never seen a tube crimped to locate a braze-on tab, but I've seen several frames with such indentations from an over-tightened front derailer.
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Old 04-06-20, 10:23 AM
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This is another picture to show the orientation of the dent.
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Old 04-06-20, 10:34 AM
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It's hard for me to imagine that the frame's maker would crimp the tube for a braze-on but not braze it on.

That would appear shoddy, no?

One option would be to force it out by shoving a lubricated, correct-sized socket through the seat tube. Be sure though that there are no pins or tube overlap preventing the socket from being pushed all the way through, and that the socket is short enough to pass through at the bb shell, or might be difficult to remove.
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Old 04-06-20, 10:51 AM
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I don't think the dent was from the factory. The two little punch marks, likely as a reference to where to place the braze on mount.

I would replace the cable guide, too far gone.
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Old 04-06-20, 11:02 AM
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Originally Posted by dddd View Post
It's hard for me to imagine that the frame's maker would crimp the tube for a braze-on but not braze it on.

That would appear shoddy, no?

One option would be to force it out by shoving a lubricated, correct-sized socket through the seat tube. Be sure though that there are no pins or tube overlap preventing the socket from being pushed all the way through, and that the socket is short enough to pass through at the bb shell, or might be difficult to remove.
That'll only work if the seat tube is straight-guage - the indent is above the butt if there is one.
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Old 04-06-20, 11:05 AM
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I am inclined as well to think the punch marks are locating marks and the dent is well . . . Just a dent. As long as I have rode it it has had Campy SR parts but it had a Suntour AR front derailleur on it when I got it I will put the blocks on it and smooth the rest with silver. Thanks all.
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