Paul, please find following quote from a friend I asked about your 117 who has forgotten more about Spanish guns than all the rest of us will ever know, he is, of course, in the trade, forgive his first sentence, he is ribbing me about the monteria !!

"Buenas tardes, 'oh killer of the stag'.

The AYA Model 117 was the forerunner of the Nº 2. It was a sidelock with
similar quality wood and finish, but it had a third bite in the locking
mechanism (a protrusion from between the extractors which engaged in a lock
in the action face).

It was felt to be a little too 'continental' for the UK market, and so we
tweaked it to create the Nº 2 as it is today. On the second hand market,
they generally fetch about 10% less than an equivalent Nº 2."

so what you have Paul is basically an early No.2, a great gun
best, Mike

p.s. he is NOT an employee of AYA (though v. close associations going back to the late 1950's