MIL-PRF-46374G
TABLE I. Operating environment. - Continued
Environment
Limits
Duration
Altitude, types II and III
Altitude of 10,700 meters
60 minutes
(35,000 feet)
Salt fog, types II and III
Salt fog test Method 509.3,
48 hours
MIL-STD-810
Human perspiration
Immerse watch in a saturated sodium
Instantaneous
resistance, types II and III
chloride solution containing 5 percent
by volume lactic acid (65 strength) at
91 °C ± 1 °C (196 °F ± 2 °F)
2 hours
Air dry
Store in atmosphere produced by a 50 20 hours
percent solution of glacial acetic acid
Readability in total
After having been stored in total
8 hours
darkness
darkness for 8 hours, and without any
intervention on the part of the user,
watch shall be readable in total
darkness
3.4.8 Case markings. The back of the case shall be marked with the information shown in table II.
TABLE II. Case markings.
Item
Descriptive title
Title and specification number
WATCH, WRIST: GENERAL PURPOSE,
MIL-PRF-46374G
National stock number
NSN
Amount of radioactive material
MILLICURIES
Nuclear Regulatory Commission
NRC MFR ID NO.
manufacturer identification number
Contract number
CONT NO.
Date
DATE
Serial number
SERIAL NO.
Manufacturer CAGE code
MFR CAGE CODE
Note: The national stock number, contract number, and date may be applied without the
descriptive titles. The amount of radioactive material and the Nuclear Regulatory Commission
manufacturer identification number are necessary only if there is radioactive material present. The
marking of the month shall be the first three letters of the month and the marking of the year shall
be the year in full, e.g. April 2009 would be "APR 2009". For type I class 3, types II and III class
3, and all class 4 watches, the date (month and year) shall be date of award of contract. For all
other watches, the date (month and year) shall be date of assembly. Only type I class 3 and all
class 4 watches shall be serialized. The serial numbers shall be assigned by the contractor. Serial
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