S-K Date Code Study

It's very early in the study but, we think we can say that the date coding system began in the S-K Wayne era. Most S-K Wayne wrenches and ratchets possess the codes, but there are some that do not. We also found out that for at least some measure of time, Dresser Industries held on to the S-K Wayne name as a subsidiary, before dropping the "Wayne" portion in the 70's. S-K Wayne is listed as a subsidiary of Dresser Industries as early as 9/1968. Wrenches and ratchets sold under Dresser all contain date codes. As you look through the examples below, please note some oddballs. One wrench (so far) with a number-letter code, some examples of "extra codes" throughout the sampling. We continue to find and upload examples so stay tuned. You can use the fields below this text to sort by wrench type, etc.

Date Code: 2B

Date Code: A

Date Code: AA

  • Additional Information:
    This wrench is from Wrench Roll Set #1815 - Metric Combination Wrench Set - 8MM - 22MM. According to the previous owner, these were bought sometime in the 1970's and were used very little. The Roll is labeled S-K Tools and bears the Dresser Industries label. We cannot be sure (except for the 8MM wrench which does not belong to the original set) if all wrenches are original to the tool roll. Some are marked simply S-K and some are marked S-K Tools on the shank. This wrench possesses the date code at the open end of the shank as well as the "T" stamp on the box end shank, and is marked S-K on the RP. This wrench also bears a "A" stamp just below the 2-letter code.
    Model: 8319 - Size - Large End: 19mm - Wrench Brand: Sherman-Klove (S-K) - Wrench Type: Combination 12 Pt.- 15 Degree Box Offset, 15 Degree Open Angle - Image:
    Image 4:

Date Code: AB

Date Code: AC

  • Additional Information:
    This wrench is from Wrench Roll Set #1713. According to the previous owner, these were bought sometime in the 1970's and were never used. The pouch is labeled S-K Tools. All wrenches are simply marked "S-K."No mention of Wayne or Dresser. This wrench possesses the "T" forge mark on the box end in addition to the date code at the open end of the shank.
    Model: C-8 - Size - Large End: 1/4 - Wrench Brand: Sherman-Klove (S-K) - Wrench Type: Combination 6 Pt.- 15 Degree Box Offset, 15 Degree Open Angle - Image:
    Image 4:

Date Code: AE

Date Code: AG

Date Code: AK

  • Additional Information:
    This DOE comes from pouch set #508 labeled simply S-K Tools. This wrench has the code forged on the largest open end, on the reverse of the S-K panel. It also has a "1" stamped on the same side, but opposite head.
    Model: O-1618 - Size - Large End: 9/16 - Wrench Brand: Sherman-Klove (S-K) - Wrench Type: Double Open End - Normal Angle 15 Degree - Image:
    Image 4:
  • Additional Information:
    This DBE comes from pouch set #360 labeled S-K Tools and bearing the Dresser logo. According to the original owner, this set was bought new and never used. This wrench has the code forged on the largest box end, on the same side as the S-K panel.
    Model: B-1416 - Size - Large End: 1/2 - Wrench Brand: Sherman-Klove (S-K) - Wrench Type: Double Box End - Normal Offset - Image:
    Image 4:

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