Type 1
Single tootch escape wheel

Type 2
Jewelled mainspring, with C shape bridge

Type 3
"Standard" Potter split plates

Type 4

Type 5
More ordinary Swiss straight bridge movement

Type 6
Potter tourbillon

Type 7
Keyless lever

Type 8
Similar to Type 3 but with one piece plate

Type 9
Unusual layout, used in watch No. 14

Databases of First Quality watches Niton - CH Meylan Watch Co. - Haas Neveux & Cie.