Viper Rarities

A long term project covering 5 Vipers from Air Forces that have less than 50-60 F-16s in service. There are lot's of Air Forces that fit into this criterion, some realy well known like Belgium, but I will focus on the more exotic ones:
- Polish Air Force F-16D Block 52 Advanced Viper, not so exotic but hey, it's the first ex Warsaw-Pact country that bought US fighters,
- Indonesian Air Force F-16A Block 15 OCU, Blue Spot Scheme, just 12 of those exist, though Indonesia bought 24 surplus Block 25 aircraft modernised to Block 52 electronics. I think the modernisation didn't include service life extension. One Block 25 caught fire during take off and it's a write-off.
- Royal Moroccan Air Force F-16C Block 52, the 4500th Viper ever built, 23 out of the purchased 24 in service (one has crashed in Yemen)
- Royal Air Force of Oman F-16D Block 50, soon to have 24 aircraft
- Royal Bahraini Air Force F-16D Block 40, 19 out of 20 in service (one crashed in Yemen)