This mid 70s Presto (Amsterdam, Holland) frame is made by a masterbuilder with a very perfectionist attitude: Peter Serier. Peter had a background in fine machanics. Throughout the bike this shows. There are plenty nice touches.
Notice the slot with the drillings at the ends under the clampbolt. Peter considered that superior in constuction than the usual clamping-solution -->
Below pic does not only show you the tubing decal, but it also clearly shows you the ridges of the stay-tops. A typical Serier feature. Fellow masterbuilder Jan Legrand, who also built for Presto, did not do this. I have heard it is created for better brazing surface, heat flow off or something like that (feel free to add to this).
Typical: Squarish brake bridge -->
...and there is also a little squarish tube behind the bracket. If you look very closely, below pic also unveils a little about the cable routing. There is no braze on, no, the cables run slotted in the bb shell itself. Simple.
View on the Cinelli lugs and the top of the Presto-typical chromed forks. The fork has a complety smooth surface. The crown fits in the blades instead of the for the era more usual other way round -->
Picture also provides a glimpse on the spacer between uppercup and locknut. So far all Prestos I've seen -and I've seen quite a lot- showed that setup. So steerer slightly longer than frame needs. A clear design choice obviously.
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