Spyderco's ATS-55 and GIN-1 (G-2 Stainless) years of use

The 1st knife produced by Spyderco was the "Worker," which according to SpydieWiki, 1st used Gin-1 (in 1981) and later ATS-55 ("around 1997-1998").

See: SpydieWiki on the Worker

SpydieWiki also reports that ATS-55 was 1st used in the Mariner (the 2nd knife produced by Spyderco) in 1997. So, it would be likely that ATS-55 was 1st used by Spyderco in the Worker in that year too.

See: SpydieWiki on the Mariner

A quick scan of the build history of other early Spyderco models does not show any earlier use of either steel in any other knives.

From what I saw it looks like Spyderco stopped using Gin-1/2 when it started using ATS-55 in 1997-98 and the use of both steels overlapped the use of AUS-6/8 & ATS-34.

Looks like the use of ATS-55 was short lived because I didn't notice any reference to it after 2001. After that, VG10 was Spyderco's go-to steel for most knives and remains a steel they still use to this day along w/the many other "modern" steels created since.

So, just based on what I saw, Spyderco used Gin-1/2 for about 16-17 years between 1981-1997/8, only used ATS-55 for about 4 years between 1997-2001 and has been using VG10 for about 19 years between 2002-now.

I did NOT do a thorough review of this data. So, anyone else who sees any gaps/ommisions is welcome to make any addenda/corrections.
 
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Can anyone tell me approximately what years these two blade steels were used?
Yep, 1990 my very 1st EDC I bought when I started my hunting operation and full time ranch was a G2 delica, was awesome full serrated, then I lost it , just bought a new G2 delica and am having holy heck trying to get it sharp, the previous owner tried to sharpen and didn’t do it to my standards, wonder if spyderco will rework a g2
Or suggest a vg10 , or someone can set me on the path to getting it scary sharp
 
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