Due to recent events, I have temporarily shelved my usual EDC gun - my S&W model 3913 - and taken to carrying my best shooting 9mm Beretta: an Italian mfg 92F (not FS), plus a spare 15 rd mag. I bought this gun used almost 30 years ago, and somebody had put an aftermarket adjustable rear sight and a replacement front sight on it. For some reason, it’s the most accurate Beretta 92 series pistol I have ever shot; and I’ve shot quite a few of them, as the Beretta 92FS was my department issue gun for the last 22 years of my LE career. But this one, this particular Italian 92F, with the adjustable sights, is by far the most accurate of any of them. Almost makes me wonder if someone somehow “accurized“ this gun, though I’ve not heard of that being done on Beretta 92 series pistols. (For the really knowledgeable folks, is there anything that could’ve been done internally to accurize this gun that I could look for?) Anyway, enough of the preamble. Is there anyone here that can help me pin down a date of manufacture for this gun? No real reason, other than curiosity; I have no intention to sell it. I’d also appreciate info on the markings on the right side of the forward portion of the trigger guard. The serial number is C829xxZ. Many thanks!