At least in the shops I frequented, Decatur pipe furniture was standard issue in the 90's and early 2000's. I know they were around much earlier too, but that was before my time. But everybody sold their stuff. It wasn't especially stylish or innovative, but it was reasonably priced and got the job done. I'd think they were too prolific and pedestrian for their pieces to be easily dated - there were just a ton of Decatur items out there at shops, eBay, estate sales, you name it. But you never know what research some industrious piper has done.
I always thought their racks were fine, though they often didn't accommodate large or oddly shaped pipes very well. The pieces with jars were always a little annoying because (as noted above) the jars were really huge, much too large for storing a typical tin. They were clearly aimed at the classic codgers that smoked nothing but Half-and-Half or the like and just refilled the jar with a new tub whenever they were running low.