Rossi Serial Number List

I recently acquired a Rossi Model 92 in .44 mag and am trying to date it. I tried the online tool and it came back with not found on the serial number. The serial number is M043XXX. It has a 16' barrel and no safety (nor does it appear that there ever even was a safety on it). It has a U-shape piece of steel on the left side of the receiver that I suspect was for a saddle ring (but no ring currently is on it). It has the large lever loop also. I know the large lever loop is just a Hollywood invention, but as someone with larger hands, I appreciate it.
On the top of the tang, it says:
AMADEO ROSSI SA.-MADE IN BRAZIL
On the bottom of the tang, it says:
MODEL 92 SRC
INTERARMS
ALEXANDRIA, VIRGINIA

I just bought this Rossi snubby from another INGO member, and I like to find out as much information as possible about used gun when I buy them.
This is a Rossi model 68S, as far as I can tell. When I go to the Blue Book of Gun Values, it talks about the Rossi model 68, and no other Rossi models fit the description of this gun. The Blue Book doesn't talk about a model 68S, but I saw a website that said that the model 68 was produced from 1978 until 1985, then the model 68S was produced from 1993 until 1998.
The left side of the barrel has the 'AMADEO ROSSI S.A.', the right side of the barrel has '.38 SPECIAL'. On the frame on the right side under the cylinder is the INTERARMS stamp, then the serial number AA132502. On the frame behind the cylinder yoke, it looks like 'M685' (Rossi didn't make a Model 685), so I'm thinking it's M68S.
Then there is some markings I don't understand. On the cylinder yoke is '5 9 88', and that also appears on the bottom of the frame when you remove the right grip. Also on the frame under the right side grip is the number 82 above and to the right of '5 9 88'.
On the frame under the left grip, it looks like 'XII.91' maybe, but the numbers to the right of the decimal look like they weren't struck well just the tops of them are visible. Also there is a number 6 perhaps above the 'XII.91'.
I have photos below. I know Remington puts different codes to identify barrels, chokes, the gunsmith who inspected it, repairs, etc. I was wondering if anyone knew what the markings on this Rossi were, and perhaps an approximate year or date of manufacture. Since Taurus bought Rossi, they don't answer any questions about the Rossis that were imported by Interarms.
Thanks for any input. BTW I'm giving this to my sister.
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