1960s Big Mac Selvedge Chambray Shirt S/M

'Big Mac' work shirt
Made in USA by JC Penney's
100% cotton selvedge chambray
Two buttoned chest pockets
Pointy collar
Buttoned cuffs
Curved hem
Selvedge details inside front placket
Original buttons
Condition: Very nice condition. Soft and easy to wear. Neck label is missing.
Size: No size label present. This shirt fits a men's modern size S or M depending on fitting. Please see actual measurements below before purchase:
Pit to pit: 20.5"
Shoulder to shoulder: 17"
Sleeve from shoulder to end of cuff: 23.4"
Back length: 27.5"