Old big AT&T large vintage cell phone model 3430 in original box with accessories -- back from the day when this was advertised as "transportable". 1992 copyright on box. This includes the phone with base unit and accessories as shown.
The handset itself measures 7 3/4" x 2" x 1 1/2". It's seen very store little if any use, and the accessories are still in plastic packaging. There are safety instructions but no manual, and I'm not sure if the set is complete because there's no contents list. Original box has some tape and stickers on it and shows expected wear on edges and some light soil.
I haven't tested the phone or any accessories because it's in such excellent condition, and I'm selling it for collectible value rather than utility, so I can't guarantee that it works...but I don't see an obvious reason it wouldn't work.
Product code: AT&T Transportable Cellular 3430 Vintage Big store Cell Phone