This J-20 (Yugoslav Air Force designation of the P-2) was built in mid 1977 and entered service as 30152. The specific history of it is currently unknown, but the J-20 was phased out of operational service in 1989. This one ended up in the storage area of the Muzej Vazduhoplovstva Beograd where it was first noted in Jun-2003. The Serbian marking was probably applied by the museum.