・Extremely rare and super-discounted sale for today only!! Immediate purchase is welcome!! First come, first served!! ・Super rare!! Vintage!! NIKKAN brand? Tokyo Kangakki (Prima) brand? / 1950s trumpet mouthpiece backbore (Good condition, fully cleaned) is up for sale!! ・As it is a vintage item, there are a few scratches and dents, but there is no problem with playing (not recommended for those who are sensitive!!). ・If you attach your favorite top cup, you can create a vintage original mouthpiece, so we recommend this once-in-a-lifetime opportunity!!