It's genuine. The style number and estimated dates in the seller's description are right too.
Thank you so much!!
I have a few more for you! I am on a vintage kick.

Item: vintage crossbody messenger
Listing number: 251328468511
Seller: northstarperf1
Link: http://www.ebay.com/itm/251328468511?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Item: vintage crossbody shoulder bag
Listing number: 331010265958
Seller: suzanne1258
Link: http://www.ebay.com/itm/331010265958?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649
Item: vintage crossbody bag
Listing number: 190895151266
Seller: tru_d_do_art
Link: http://www.ebay.com/itm/190895151266?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649