The Pressin was a two-shot derringer made to be disguised as a pair of glasses. It was intended for use by politicians, military officers, and other potential victims of kidnapping by groups like the ETA.
It held two rounds of a special 7.65mm E cartridge, which was a rimless .32 ACP with a case cut down to 15mm. It was loaded to a higher pressure than normal .32ACP, firing a 5 gram (77 grain) bullet at 250 m/s (820fps).
Ian’s Video: [11:45] https://youtu.be/FHmFUT9tEdg?si=
I did my military (conscript) service in Spain during the “Lead years”. I was enlisted, but carried a sidearm when in uniform outside the garrison. These fuckers always used ambush-gerrilla tactics, so you wanted to have something to shoot back at all times. My father was a Captain in the reserve, and for years carried a 22 with him, as ETA sometimes shot military in plain clothes in the street. So, this thing was not too unreasonable.