RM324 mower deck ID tag

[J854D 137]

I have a RM324 mower deck on my 854.It is in solid shape for it's age.I have searched the deck thourghly for an ID tag or decal & I can't find anything or any remnants of one.(metal tag rivets or rivet holes or painted over decal) The PO had painted the deck, but he had taped off the "caution" & "keep well greased" decals & they are in good shape. A few pictues i've seen here on Red Square & elsewhere online shows some of  the ID tags being located on top of the deck in front of the RH gear cover. My goal is to do an authentic restoration of the mower deck including a replacement model/serial no. tag if it was originally equiped with one. My question is, did some mower decks leave the factory without an ID tag? Perhaps if they wre included with a tractor that they were sold with? Thanks for any information that you may have. -Jerry-