Two Smiths Interval Timers

2 Smiths interval timers.

Details

Category:
Photographic Technology
Object Number:
1980-611
Measurements:
Part 1: 145 mm x 121 mm x 65 mm, .46 kg
Part 2: 145 mm x 121 mm x 65 mm, .46 kg
type:
timers
credit:
Science Museum (Photographic Studio)