Pretty standard mods to the JF.
I think they are nice watches. Not a huge fan of the JF midcase, crownguards are a bit stubby for me.
I have handled a few JF subs and I also think that their gaskets are a bit thin. My last one I replaced the caseback, crystal ring, and tube/crown gaskets with replacement grade stuff from ST. They were very dry as well.
Genuine no AR no LEC crystals are also pretty difficult to identify definitively. I like ST crystals.
The dials are great and the hands are the best 3135 alternative to gen by far.