How to find a JetDirect MAC?

In order to assign a static IP to a printer on a network, I need the MAC of a JetDirect (This is a JetDirect J3111A on an HP 4000). I've opened the web page on the JetDirect, but it doesn't work, because HP based this software on Java, and its Java is now so old that present-day Java refuses to open it, citing the security risk.

There is no label on the JetDirect itself, or any other indication of the MAC that I can find.

I don't recognize any MAC in the printed out JetDirect Configuration Page, but i does give a "LAN HW address", whatever that is (0060B0CB21C7) and a "mfg id", namely 38023802900534.

Anyone have any suggestions on how to find the MAC of this JetDirect? Thanks.

Lan hardware address is the mac address, sometimes it is printed on the barcode on the card