Bought this yesterday, mostly because I have not seen one before. Works ok, fully functional but needs a service and a new alarm hand.
Haven't opened it yet, probably as basic as a Pocket Ben or maybe even worse? If that is possible, so that might be my weekend project to open and give a basic service.
Not a Big Ben or a Pocket Ben but a Baby Ben from Westclox
I love it. One just like this was my first Omega and first real watch in 1987. I found this one a couple years ago on ebay. It's been refurbished by Omega in Switzerland. Yours is very cool also.
It's lovely. @seekingseaquest has great tastes and has tracked down a number of these vintage non-luminous beauties. Lucky you for convincing him to part with one.