What a nice a Lettera 22 with a family history!
I hope you have the case in tact. If you do, please notice that the lining may be surprising:
In the 60s, Olivetti produced its machines at a facility in Glasgow.
My case has suffered from zipper separation. I would like to find another, but as the writer says " ‘has about as much chance as a one-armed blind man in a dark room trying to shove a pound of melted butter into a wild-cat’s ear with a red-hot needle.’.