What a beautiful bag! It's amazing that it's been in your closet all this time and it's in such excellent condition.
You might try selling it on eBay, but be sure research it first to find out how much you should ask. Coach bags made in New York City at the original Coach factory are sought after by collectors, especially in pristine condition.
Here's some information on the Stewardess, part of a huge exhibit at Coach's new headquarters in New York. Fellow tPFer @VintageIsBest posted a fantastic set of photos on the Vintage Coach Photos and Chat thread:
Vintage Coach Photos & Chat
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The sign reads:
Stewardess Bag, 1977. Introduced as a "regulation flight attendant's shoulder bag with extra large carrying capacity," the Stewardess bag was favored by jet-setters and magazine editors alike. The signature pairing of style and functionality were so sought-after, Coach was tasked with designing a slimmer version for United Airlines' cabin crew in the 1980s.
I am astonished at the exceptional knowledge of the people on this website. I am so appreciative. I am going to look for more numbers on the leaflets and post what I can find. I am kinda thrilled to find people that are interested and excited to see this never used old purse.
My husband thinks he remembers all these Coach boxes in the closet prior to his graduation from College in 1979. I have to look at the other boxes I have. I gave away several other new Coach purses from her collection because I did not know they had any value and I did not want to use purses as big as these were, but I am sure that they have never been used because they have been in my closet for about 30 years.
One leaflet says they have been manufacturing leather goods for 35 years. I looked up the year Coach started, which was 1941, so that leaflet was printed around 1976 or 1977.