Hi Bartc,
The way the Watch license works is that a code will be generated for your specific model of printer, and it will allow you to print to it without restrictions. We can grant you a Watch license for any printers that supports PostScript, so your printer should work just fine.
The "Can output to licensed PostScript® devices only" is more to compare it with the other two licenses, which offers a bit more freedom in terms of what printers you can print to. The Office license allows you to print to any printers by using a Windows printer driver, even some non-postscript printers. (while still allowing you to obtain a printer license if you need standard postscript printing) The Production has all benefits of the Office version + the ability to do standard postscript on ANY postscript printer, so it's only limitation is that you still need a printer license if you need to have a printer-resident document.
I hope this clarifies things a bit. If not, don't hesitate to contact our Activations department at activations@ca.objectiflune.com if you need more information about licensing.
Regards,
Raphaël Lalonde Lefebvre