I had a PAM 190and the PR indicator was very useful. I like a turn over in my collection every 1 to 2 weeks and do not have to move hands on all of them to correct time. In fact for a 3 day movement, I expect the same but in your proposal only PAM 510 is a new model and...
I'm sureAdding the pr indicator is possible. Question is the associated cost. i would guess that OP is trying to keep the cost low on the entry levels models such as this.
THE SEA, HISTORY, TECHNOLOGY AND DESIGN While the Panerai brand was founded in Florence in 1860, the Panerai watch came into being in the world of the depths of the sea. To be precise, the depths of the Mediterranean, where in March 1936 the commandos of the Italian Navy first tested the prototype created by Panerai in response to the request from the General Staff to develop “a special luminous underwater watch”. The Royal Navy, as it was then called, evaluated the creations of many established producers, ... .