The TESTING Collection by Casa Competizione.

The TESTING Tee - featuring prototype number circle with high quality plastisol screen printing of all logos front and back, along with a individualized stitched Varianti Emozioné garment homologation label near the hem. 

"PROVA" - "TEST" or to PROVE. Originally used by historic Italian cars who first had these very 5 letters painted on them during testing so Italian Authorities would not bother the test drivers during unrestricted road testing. 

You can try and get away with it today, probably won't work, unless you happen to live in Maranello. BUONA FORTUNA