1953:
Seton Creaghe Engineering
Seton Creaghe Engineering. - Prototyping
Rec. Num. 1 of 2
Source: Flight May 29th 1953
1955:
Seton Creaghe Engineering
Seton Creaghe Engineering. - Selective Sound Generation
Rec. Num. 2 of 2
Source: Aeroplane July 1st 1955