Calvago Ferrari team shirt XL what's it worth?

My wife bought this knit shirt at a vintage clothing store, cause she knows my favorite brand but I want a guess as to what it's worth. I can't read the name of the brand, it doesn't say Made in China inside. Is Calvago a team? What year did they run? I guess it' a replica, size XL. I'll take it with me to my art booth at Concorso this August but like to have a handle on what it's worth... (I'd wear it but I'm afraid it may be too sporting for my age--i pre-date the inauguration of Ferrari Spa in 1948
...)
Image Unavailable, Please Login Image Unavailable, Please Login

 

Thanks for the info. I suppose there's collectors of cycling shirts just like my room-mate who had 30 pairs of sneaker (after not being able to afford a pair as a teenage) I'll offer it for $100 or free if they buy my $600 painting of a GTO engine. I wish I could join that bike riding crowd but scared some of the routes they take--like on mountain roads where cars coming behind them don't expect them .