Originally Posted by
Prowler
Thanks. Different in that the hole is centered on the slot. Similar in that the seat tube is not slotted.
AFAIK the
Monarchs and Crescents were made in the same shop. I still wonder if the variations were planned or were workmanship issues. More data!
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Keep in mind that frame under discussion is some years earlier than yours.
Some of the variations through time in model 319/320 frames are discussed on this enthusiast's page:
http://www.cykelhobby.com/92320ident.htm
Readers with an interest in Swedish cycles may wish to begin an exploration at the home page:
http://www.cykelhobby.com/
Cinelli seemed to have a strong belief in drilling holes in this spot to get rid of stress risers. Here is an early 1950's example with three holes:
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