BRAND
MARK 1
MODEL
Zero
TYPOLOGY
wrist professional amagnetic depth gauge
OPERATION
Bourdon tube
SCALE m
20 linear
BODY mm
-
DIAL
black with light blue luminescent perimeter band - black indexes and numbers - central writing "non magnetic" and radioactivity symbol at the top - black and white hands
TOTAL WEIGHT g
-
SPECIAL FEATURES
clear plastic mesh strap
NOTE
the luminescent coating of the inner perimeter band is thallium-based
COUNTRY OF ORIGIN
Usa
YEAR OF PRESENTATION
1959
SOURCE
Andrea Campedelli archive