I have a repainted MASI 24" c-t. It has added braze ons brake guides. It does not have a serial # or an MCXX on the BB. It also has a seatlug without a window in the top tube tang like my 1974 GC though the seatlug does have the drilled extended seat tube tang. Can anyone help me with the history. BrIAN CHIlly in Berkeley (The other Brian B)