Back view, Serial number and model number location, Back view serial number and model number location – HP Laserjet p1606dn User Manual
HP LaserJet Professional P1560 and P1600 printer series
HP internal network port (HP LaserJet Professional P1600 printer series only)
Duplexer and rear jam-access door (HP LaserJet Professional P1600 printer series only)
Serial number and model number location
The label that contains the product and serial numbers is on the rear of the product.