[plug] Which B/W Laserprinter?

[Peter Sutter]

I have a requirement to print timecards (200gsm cardboard) in duplex mode 
(both sides). 

Yes, I know, most printers nowadays can print duplex, the more expensive ones 
also accept 200 gsm paper. I need the combination of the two, print both 
sides of the timecard without manually flipping the paper around.

The printer should also accept jobs from a linux machine as print server via 
network (not usb or parallel).

Peter