TY  - BOOK
AU  - Aydlett,Guy D.
TI  - The square recoil escapement: a special case 
PY  - 1975///]
CY  - [Place of publication not identified]
PB  - [publisher not identified]
KW  - Clock and watch making
KW  - Clocks and watches
KW  - Escapements
KW  - fast
KW  - Clock (general)
KW  - Recoil
KW  - Escapement
KW  - Escapment Science
N1  - Cover title
ER  -