The only one Britten-Norman BN-2A Islander 1968 (Kaset 501)in Thailand.It was operated by KASET (Thai Ministry of Agriculture)from July1968-Jan.99.
The Hughe 369D Helikopter 1973 (Kaset 1013)was operated from Sep.1977-Jan.99.
From 1969 Kaset introduced theier own serial number.
See in the Golden Jubilee Museum of Agriculture