Serial Number Tags
Overview
The serial numbers on the back of your Kaypro came in multiple different versions over time. I attempt here to show the different styles and potential "skips" in the numbering system.
The current research leads me to believe that the earliest serial number was around #2,500. Marshall who worked for Kaypro commented:
"They did not begin with serial number one. It was a running joke on campus - one that was true - that serial numbering depended on who was running the line that day. It caused a lot of headaches in support and repair."
(Marshall Moseley, Facebook Posting, September 2025)
Small Grey Tag (6 digits) Version 1
Range seen 2561-21460
|
The first serial number tags that I have seen are the small grey tags with 6 digits. |
Small Grey Tag (5 digits)
Range seen 22755-99300
|
The second serial number tags are similar to the first tags but they are limited to 5 digits. |
Small Grey Tag (6 digits) Version 2
Range seen about 100000-158324
|
Some might argue that this is not a new tag since it appears that these tags were required since they had reached 100,000. |
Large Grey Tag
Range seen 200494-215417
|
The first one that I know of is 200494. I suspect that there may be as many as 40K that are skipped and they may have restarted at 200000. They appear to end somewhere after 215417. |
Large White Tag Type 1
Range seen 240019-274022
|
The first on that I know of is 240019. Again there may be a skip of as much as 25K maybe restarting at about 240000. |
Large White Tag Type 2
Range seen 283822
|
|
These look a lot like the previous ones but the font used is taller in appearance. |
Large White Tag Type 3
Range seen 398964-418199
|
|
These are the last tags used and they have a "dirty" appearance almost grey in coloring. Also note that the breakaway slits are close together on the bottom and top compared with the early tags. |
