What you are seeing are pins that are used to hold the tubes and lugs together for brazing. Richard Sachs has good photos showing his use of pinning:
Long Beach, CA USA
> After a long period of running the wrong era bottom
> bracket (C-
> Record) for my Rossin Pista i have finally picked up
> the correct one
> (Record). So I uninstalled the existing setup and
> began cleaning. As
> i fingered around in the bottom bracket shell, I
> felt something odd,
> something out of place - a 'tubular' protrusion?
> So I got down on my hands and knees with a
> flashlight to investigate.
> What I found is what appears to be rod of metal
> (steel, I would
> gander) sticking cockeyed from the inside wall of
> the downtube. I
> took a photo which can be seen here:
> Framebuilders and arm-chair frame-builders alike...
> what is this
> 'rod'? Is this a defect, supposed to be there,sloppy
> craftmanship, or
> God forbid, a fix from the past? The paint is not
> original but the
> bottom bracket shell has most likely since it still
> has the "R" for
> "Rossin" cutout in the bottom.
> Your thoughts please.
> Mark Buswell
> San Francisco, CA
> United States
> Mark Nevin Buswell / SisuHome
> 1/Half-Finnished DESIGN and ART
> m 415.341.6516
> e email@example.com
> w http://www.sisuhome.com (UPDATED SEP 9)
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