NSN 6645-00-879-8637
Part Details | CHRONOMETER
6645-00-879-8637 An instrument for precisely determining time, manufactured to close tolerances to assure the time-keeping qualities of dependability and consistency of rate. These qualities are accurately ascertained by comparison with more exact devices or by astronomical methods so that the accumulated error may be taken into account when determining time. Its usual uses are to indicate time for navigational purposes, and to serve as a reference for less accurate timepieces. It is usually provided with a winding indicator dial and is usually mounted in gimbals to maintain the instrument in a level position. May consist of a spring driven or other type of movement which is capable of exacting performance without regulation throughout the normal range of room temperatures. Not designed for carrying on the person.
Alternate Parts: 6645-00-879-8637, 00-879-8637, 6645008798637, 008798637
| Supply Group (FSG) | NSN Assigned | NIIN | Item Name Code (INC) |
|---|---|---|---|
| 66 | JAN 01, 1962 | 00-879-8637 | 18695 ( CHRONOMETER ) |
REFERENCE DRAWINGS & PICTURES
Cross Reference | NSN 6645-00-879-8637
| Part Number | Cage Code | Manufacturer |
|---|
Technical Data | NSN 6645-00-879-8637
| Characteristic | Specifications |
|---|---|
| BACKGROUND COLOR | SILVER |
| SCALE NAME | 12 HOUR |
| DIAL SCALE MARKING LUMINOSITY | NONLUMINOUS |
| LUMINOUS NUMERAL | NOT INCLUDED |
| INSCRIPTION COLOR | BLACK |
| HAND QUANTITY | 4 |
| HAND DESIGNATION | HOUR HAND AND MINUTE HAND AND SECOND HAND AND WIND INDICATOR HAND |
| HAND TYPE | SWEEP AND SWEEP AND ECCENTRIC AND SWEEP |
| HAND COLOR | BLACK AND BLACK AND BLACK AND BLACK |
| LUMINOUS HAND | NOT INCLUDED |
| JEWEL QUANTITY | 14 |
| MOVEMENT SIZE DESIGNATION | 85 |
| MAXIMUM RUNNING TIME | 56.000 HOURS |
| WINDING METHOD | B ANY ACCEPTABLE |
| ESCAPEMENT TYPE | D ANY ACCEPTABLE |
| CORRECT TIME RESET TYPE | KEY |
| CASE MATERIAL | BRASS |
| CASE SURFACE TREATMENT | POLISHED |
| CRYSTAL TYPE | B ANY ACCEPTABLE |
| CARRYING CASE | NOT PROVIDED |
| TIME TYPE | MEAN SOLAR |
| MOUNTING METHOD | GIMBAL CASE |
| MOUNTING CASE | INCLUDED |