NOS Vintage Nitto Track Stem 55mm reversible type NIB Pista NJS Keirin
Alloy.
55mm extension, 25.4mm clamp and 75mm quill.
"Reversible type".
"BIA" stamp.
Very rare.
Cute that the box has Nitto's information printed:
"Nitto Handle Works Co., Ltd.
41-2 Arakawa 4-Chome Arakawa-ku
Tokyo Japan
Telephone: (03) 892 4521"