The manufacturer of all of the key mechanical parts on the LW 4/600, including the print engine, was Canon. Canon's "PX Engine" was also the basis of the HP LaserJet 4L, 4P, 4ML, and 4MP models, as well as Apple's Personal LaserWriter 320. As a result, toner cartridges, paper trays, etc. which will work in one of these printers will generally work in all of them. Canon also sold some PX-based printers under its own brand name. Canon still makes engines for HP. Googling will give a bunch of examples. -j duolist at listserver.themacintoshguy.com on 12/5/04 12:52 PM wrote: > I have an Apple LaserWriter 4/600 that I bought in 1995 and it's the >printer that will not die. Zero problems. Zero glitches and I've cranked out >many multiples of thousands of pages with just one perfunctory >cleaning/service. It's still my everyday printer for all my Apples and Macs, >even though I have some other, fancier and newer units on the network. I >despair of it ever wearing out. > My question is; who built it? I feel I should make homage to the company >Apple contracted with to build it, but I don' know that I have ever heard. >Many thanks. > >Jim Allen