I can't tell from the picture, but the requirement is for a fire-proof plate. That would normally mean stainless steel with etched, engraved or stamped lettering.
Aluminium doesn't qualify as fireproof.
AC45-2D gives a guide to what should be shown:
(1) The builder’s name, which may be the name of an individual, firm, co-partnership,
corporation, company, association, or joint-stock association.
(2) Model designation.
(3) Builder’s serial number.
(4) TC number, if any.
(5) Production certificate (PC) number, if any.
(6) For aircraft engines, the established rating.
(7) For aircraft engines, the date of manufacture, that is, month (two digits)/
year (four digits).
(8) For aircraft engines, the engine’s approved 14 CFR part 34 designation. (Part 34
discusses fuel venting and exhaust emission requirements for turbine engine-powered airplanes.)
Approved designations include comply, exempt, and non-U.S. for engines specified in part 34,
manufactured on or after January 1, 1984.