PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

390Stopwatch

Marathon Watch Company Ltd · NSN 6645-01-106-4302 · FSC 6645 · No Item Name Available
Verified by PartsTable
NSN 6645-01-106-4302 — this item is cataloged by the U.S. Government under National Stock Number 6645-01-106-4302. Primary manufacturer part number: 390.
Features
  • Stopwatch — FSC 6645
  • Scale Quantity: 3
  • Control Method: CROWN OR PUSH-PIECE AND MOVING SIDE SLIDE
  • Scale Name: HOUR AND MINUTE AND SECOND
  • 6 verified cross-references
  • Primary manufacturer: Marathon Watch Company Ltd
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Stopwatch, cataloged under National Stock Number 6645-01-106-4302, is classified within Federal Supply Class 6645 (No Item Name Available) of the Instruments and Laboratory Equipment group. The primary manufacturer of record is Marathon Watch Company Ltd. Government technical data includes 3 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN6645-01-106-4302
Primary Part Number390
Item NameStopwatch
FSC / FSG6645 / 66 — No Item Name Available
ManufacturerMarathon Watch Company Ltd
StatusCANCELLED
Scale Quantity3
Control MethodCROWN OR PUSH-PIECE AND MOVING SIDE SLIDE
Scale NameHOUR AND MINUTE AND SECOND
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
8030-00-835-4348 INTERCHANGEABLE
Corrosion Preventive Compound
6645-01-376-2329S602XE INTERCHANGEABLE
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Accusplit Inc
6645-01-376-2330AX725BK INTERCHANGEABLE
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Accusplit Inc
6645-01-376-2331A601XBK INTERCHANGEABLE
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Accusplit Inc
6645-01-376-2335AX605 INTERCHANGEABLE
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Accusplit Inc
6645-01-376-2336S3MAGXLBK INTERCHANGEABLE
Stopwatch
Accusplit Inc
6645-01-378-2996 INTERCHANGEABLE
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6645-01-380-0946LC5000 INTERCHANGEABLE
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Faehr Electronic Timers Inc
6645-01-380-0990 INTERCHANGEABLE
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6645-01-380-1075RS500 INTERCHANGEABLE
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Cross-Reference Index
Part NumberManufacturer
390 Marathon Watch Company Ltd (CAN)
ST083000 Marathon Watch Company Ltd (CAN)
SW601 Franklin Instrument Company, Inc. Div Franklin Instrument Co (USA)
SW-529 Franklin Instrument Company, Inc. Div Franklin Instrument Co (USA)
083000. Marathon Watch Company Ltd (CAN)
CVC STOPWATCH Dla Aviation Engineering Div Department of Defense (USA)
Related Parts
8030-00-835-4348INTERCHANGEABLE
CORROSION PREVENTIVE COMPOUND
6645-01-376-2329INTERCHANGEABLE
STOPWATCH
S602XE
6645-01-376-2330INTERCHANGEABLE
STOPWATCH
AX725BK
6645-01-376-2331INTERCHANGEABLE
STOPWATCH
A601XBK
6645-01-376-2335INTERCHANGEABLE
STOPWATCH
AX605
6645-01-376-2336INTERCHANGEABLE
STOPWATCH
S3MAGXLBK
6645-01-378-2996INTERCHANGEABLE
STOPWATCH
6645-01-380-0946INTERCHANGEABLE
STOPWATCH
LC5000
6645-01-380-0990INTERCHANGEABLE
STOPWATCH
6645-01-380-1075INTERCHANGEABLE
STOPWATCH
RS500
6645-01-380-1172INTERCHANGEABLE
STOPWATCH
6645-01-380-1189INTERCHANGEABLE
STOPWATCH

Frequently Asked Questions

What is NSN 6645-01-106-4302?

NSN 6645-01-106-4302 is a Stopwatch, manufactured by Marathon Watch Company Ltd, classified under FSC 6645 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 6645-01-106-4302?

NSN 6645-01-106-4302 has 6 cross-referenced part numbers: 390 (Marathon Watch Company Ltd), ST083000 (Marathon Watch Company Ltd), SW601 (Franklin Instrument Company, Inc. Div Franklin Instrument Co), SW-529 (Franklin Instrument Company, Inc. Div Franklin Instrument Co), 083000. (Marathon Watch Company Ltd) and 1 more.

What NSN replaces 6645-01-106-4302?

There are 12 known substitutes for 6645-01-106-4302: 8030-00-835-4348, 6645-01-376-2329, 6645-01-376-2330 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 390?

Key specifications for 390: Special Features: DIGITAL DISPLAY, HOUR, MINUTE, SECOND AND 1/100TH SECONDS; SINGLE ACTION, TIME IN / TIME OUT, CUMULATIVE LAP AND CONTINUOUS TIME; Scale Quantity: 3; Part Name Assigned by Controlling Agency: STOPWATCH HOUR MINUTE & SECOND SCALE CROWN OR PUSH PIECE CONTROL; Control Method: CROWN OR PUSH-PIECE AND MOVING SIDE SLIDE. 5 total characteristics are documented in the Federal Logistics Information System.

Is NSN 6645-01-106-4302 still in active supply?

NSN 6645-01-106-4302 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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