I have a Hickey-Freeman MTM navy blue shawl tuxedo with the same tag ('49-'62), plus about 3 SC's, but my oldest is a B&W herringbone w/ blue specks SC with the '39-'49 tag. I've seen a few other people with 1930's stuff in addition to those who already posted, but I don't know if they were thrifted or picked up elsewhere.
The tuxedo is way too big for me, but I'm having a hard time letting it go. A part of me is tempted to invest the $300+ it would take to completely recut the pants and fit the jacket. I don't remember if I mentioned this, but my grandmother worked at HF from about '48 to '78. I like to think that she may have worked on it, which would make it a totally awesome thing to wear if I eventually get married. According to my mom, my grandmother specialized in buttonholes and worked on suit for President Johnson. When I was over at my parents a few weeks ago and told them how I was getting into a wee bit of minor tailoring, my mom pulls out a piece of my grandmother's chalk and some of her silk to give to me. Kind of a cool memento to have of her. I wasn't paying attention to such sartorial things back when she was alive.
Wow and double wow!!! Got pics???!!!