The organ was originally built in the 1930s by the John Compton Organ Company Ltd as a 3 rank 'Miniatura' model instrument for Winchester Grammar School. I am not sure when it was removed or if it went elsewhere but the organ is now here at Holy Trinity. A Trumpet and a Bourdon have been added as well as a 'Cymbelstern' percussion stop.  In around 2005, several digital stops were also added with the samples provided by Makin Organs Ltd but these are not currently functioning. 

The working stops are as follows:

PEDAL
Open Wood 16'
Hohl Flute 8'
Trumpet 16'
Great to Pedal
Swell to Pedal

GREAT
Open Diapason 8'
Hohl Flute 8'
Gemshorn 8'
Octave 4'
Gemshorn 4'
Fifteenth 2'
Super Octave 2'
Trumpet 8'
Swell to Great

SWELL
Open Diapason 8'
Hohl Flute 8'
Gemshorn 8'
Hohl Flute 4'
Nazard 2.2/3'
Block Flute 2'
Trumpet 8'

ACCESSORIES
3 double touch thumb pistons to great and pedal
3 double touch thumb pistons to swell and pedal
1 canceller thumb piston - great to pedal
1 canceller thumb piston - swell to pedal
Cymbelstern