That being said they are very very nice sounding and definitely a great match for this guitar. Could probably find out by opening it but I don't have the time. The second upgrade is the steel block for the tremolo, its very thick. This gives the guitar way better ressonance IMO.
Apart from that I'm pretty sure its fully stock. This guitar features a rosewood slab fingerboard which feels lovely and has a great neck.
The frets were polished after I bought the guitar along with a setup but it could maybe use a little love, it still plays amazing. There are some marks which I have posted in the photos but its nothing to worry about just surface scrapes due to age and use. Cash or bank transfer on the day.
U can obviously try it on the day. Please ask questions but the price is firm, not taking offers. It's an amazing guitar for a steal of a price.