Robert, the older Berettas have laquered wood and is obvious from the oiled stocks, yours with the Mobil chokes will def be laquered. Please be aware that the laquer on modern Berettas is not like any varnish, it is more like a two part epoxy resin sprayed on. It will be very difficult to shift even with Nitromors. I did my Beretta Urika, it took months to get it all off with glass scrapers and then hot washing the wood to raise the grain, wet and dry and so forth before the Rapid oil went near it. The gun sold for £100 more than I paid for it 8 years before.
There are many stocks also that have what is called Xtra wood coating, which looks good for a laquer finish, if you take this coating off you will have cricket bat underneath, the xtra wood had fake grain in the application process.