Clock corner reference room

General information

• Appraising and dating your clock (165KB)
• Model/type listing (71KB)
• Simplex acquisition of IBM's clock business (58KB)
• Time equipment division history (101KB)

Card recorders

• Engineering data sheet (199KB)
• Service instructions (1.21MB)

Dial recorders

• Engineering data sheet (680KB)
• Service instructions (839KB)

Master clocks

• Colonial master clock data sheet (PDF, 318KB)
• Grandfather master clock data sheet (PDF, 318KB)
• International master clock data sheet (PDF, 318KB)
• Master clocks, secondaries & control equipment (background information) (PDF, 86KB)
• Number 13 data sheet (PDF, 423KB)
• Number 16 data sheet (PDF, 437KB)
• Number 17 data sheet (PDF, 624KB)
• Number 21 data sheet (PDF, 318KB)
• Number 22 data sheet (PDF, 318KB)
• Number 23 data sheet (PDF, 318KB)
• Number 24 data sheet (PDF, 318KB)
• Number 25 data sheet (PDF, 392KB)
• Number 31 data sheet (PDF, 318KB)
• Number 32 data sheet (PDF, 318KB)
• Number 33 data sheet (PDF, 318KB)
• Number 34 data sheet (PDF, 318KB)
• Number 35 data sheet (PDF, 435KB)
• Ornamental master clock data sheet (PDF, 318KB)
• Parthenon master clock data sheet (PDF, 318KB)
• Price list (PDF, 89KB)
• Service instructions (PDF, 2.25MB)
• Style A (PDF, 1.05MB)
• Type B & Type C (PDF, 741KB)