Another BCOC found on this site:

telaio Bianchi Columbus Max | BDC-Forum.it

Sellers pictures and I get the serial to BCOC359 - but I am uncertain on/of the last digit - it might also be 353. Have a look at the last pic and give your opinion.

What is extra interesting here is that it is "in the nude". TIG welded except for seatlug and small bits. Wish the pics were bigger.








The updated (28-02-2017) list:

F030
F058
F136 (added 7/7 2016 found at "vintage art work" on flickr)
F.243 (added 5/5 2016 - and also has a dot as 254)
F.254 (has a dot between F and number)
F287 (added 16/8 2016 -found in old ebay auction)
F326 (added 17/1 2017 - found at registrostoricocicli.com)
F370
F382 (mine)
F403 the one in the PDF-file at http://www.ciclimasini.com/images/90...i%20Caurus.pdf

BCOC104 (added 25/10 2016 courtesy of scooterpants) Stolen in 1993 - if you see it - let scooterpants know.
BCOC112 (added 25/10 2016 courtesy of scooterpants)
BCOC115 (added 25/10 2016 courtesy of scooterpants)
BCOC157
BCOC359 (last digit might also be a 3) (added 28/2 2017 - from telaio Bianchi Columbus Max | BDC-Forum.it)
BCOC360
BCOC515 (the O probably stamped at an angle - making it look like BCCC)