Carrying ambulance markings. Registered on 28 March 1962 and delivered to ČSA on 3 April 1962. Operated by Slov-Air from 1 July 1969. Registration cancelled on 15 January 1985.

Entered Czechoslovak service with a liaision squadron in 1974.

The military version of the Z-37T, armed with bombs and rockets, was almost forgotten. Its development in 1985 was apparently suggested by East Germany, but not proceeded with and the prototype soon became a regular Z-37T cropduster as OK-PJD. It ended up at Kaposvar, Hungary as a spares source. Restored in its original colours, it was unveiled on 24 June 2017 at the Kunovice museum.

The L-29A was a single-seat Delfin, dedicated to aerobatics. Only a few examples were built. Note the dolphin artwork.