Haha, yeah I was definitely expecting something more exotic.
So, based on some research, I think the VIN is valid. I don't think it gives any indication of manufacturing date, though I'm really surprised this just isn't on a label somewhere on the firewall or door jamb.
Is there a Chilean equivalent of the DMV that can provide any sort of registration history? Surely there's an initial Nissan dealer that may be able to help with records, too, if you can find them. Have you tried contacting Nissan Latin America?
https://nissanlatam.com/
What would be really helpful is the Latin American R50 FSM, since it might indicate other locations for the certifications label found in the door jamb. It would also decipher the VIN.
For what it's worth, here's how I'm reading the VIN:
JN1 - Origin, produced where AUS R50s are produced (US are from JN8 or JN6)
V - Body type, V=Wide
D - Engine type, D=VQ35DE
Z - Axle type, Z=Part-time 4WD
R50 - Model code
Z* - Destination region, Z= not "Australia, New Zealand, the Middle East, Iraq, Libya, Europe, Israel, Venezuela, Ecuador and Peru"
0* - Stop-gap (meaningless)
100193 - serial number
This is based on the International VIN pattern and the Model Variation codes that Nissan tables in the GI section of the FSM.
For body style, there are options T=Wagon and V=Wide. Apparently, XE models are considered "wagons" while SE/LE and ST/TI (AUS) models are "wide", probably due to the wheel and fender flare combinations (if you've seen older XE models on stock steel wheels, you can see how awkward they look with the tires tucked in).
For axle type, there are options of U=2wd, W=Auto-Mode 4wd, and Z=Part-time 4wd. W didn't exist on older R50s, but is the only option for 1997+ QX4. Apparently W is the only option for 02-04 AUS models, too.
For engine types, A=VG33E (older R50s and non-diesel AUS models), D=VQ35DE
This is consistent with an observation of 2002-04 AUS R50 VINs that I could find at AUS used car websites...they all had JN1VAWR50A0######, indicating they are all wide-body (ST/TI) 3.3L All-Mode 4WD. I don't think the VQ existed there due to space issues with RHD.
For the two * values above, I found some FSMs that indicate a subtle code difference depending on destination country. For countries like AUS, NZ, and some European destinations, these are destination codes and a stop-gap (irrelevant) value. But for Israel, Brazil, and Venezuela, it could be model year and manufacturing plant. I did find Z references in 2003-2008 D22 FSMs where Z means 'not a bunch of countries' (for a similar, albeit different VIN pattern, Z did also mean "Iraq and Libya"...surely not the case here.) Although these may not necessarily apply to the R50, it's the only indication I've found that Z may actually be a valid value.