Yes, factory engraved - back before the days of laser engravings and CNC engraving. These are very collectible and not something i would buy and shoot. If it looks to be unfired then definitely don't shoot it.
I have one in .380 made in 1974, in the matching box with target etc, but it has chrome finish (not nickel - check the 1974-75 Interarms catalog you doubters) and I'd put mine valued about $4,000+ based off of several 2-3 year old actual "sold" pistol data.
There is one or two gold plated 22LR's like yours on GBroker that are asking $5K and up. "Asking" - not selling/sold. Either way if you got into this rightly its a slam dunk investment to beat inflation and something you can enjoy - but if you want a shooter 22LR the new ones are super reliable and low cost so pick one of those up too.