Vintage Early 80’s Black leather Adjustable Strap Small Shoulder Messenger Bag

Late 70s early 80s vintage treasure Simple, clean line black bag with flap Not sure what type of material this bag is made of (can’t tell if it is real leather or it’s man-made leather) Interior is clean, like new, with only a small mark shown on one photo on the interior of the flap Comes with a small snap button case( that also seems unused/new) Great thing about this bag is that the shoulder strap is made out of two pieces with snap buttons and can be used as a long one or double/shorter version as a under arm small shoulder bag Please see photos for dimensions and details, feel free to ask questions before purchasing, I will respond as soon as I can. Reasonable offers are always welcome. :-)