The pictures suggest it's a nice 'clean' example. If the hands have any grey tone and/or unevenness to the edges, it is oxidisation which is common in some older models, mainly Subs. The hands can be replaced but only with 'L' Luminova lume, not the original 'T' Tritum markers it currently appears to have. Many like purity and originality regardless. Many don't. Depending what you paid for it, it's a nice looking watch and personally i'd live with it happily and leave it alone,
Hand-books to some extent are generic but i believe a Sub instruction manual should show a Sub on the front cover if it's specifically correct. The operating process is exactly the same however as a Luminor Marina aside fom the bezel calibration facility.
With the queries you've raised i'm surprised you bought it
You do have a famous Panerai enthusiast in Aus. If you don't know of him, Google "Hammer Paneristi"