I just aquired an Olmo road bike from a friend. It’s been powdercoated and has no decals, so any help would be appreciated. It’s got a Cinelli bb stamped with the following serial.

On the outside of the shell vertically it reads 58
48c

I’m pretty sure the 58 denotes the seat tube, as it is a 58 c-t-t with a 55 ctc tt.
The 48c i’m not too sure about.

Then the main # reads, brev-221298-84
Now, it’s been powdercoated, and I have no doubt about the brev-22129 part, but the rest of the # is my best guess due to the pc.

I’m thinking the 84 is the production year?

So, any leads are appreciated, thanks in advance!

Sorry for the novel, but you know how it goes...