One is 4 7/8" and the other is 4 3/4" long the former is numbered 087982 and the later 131121.
However, I'm not sure how accurate this information is because I've got 2 Mark I's and neither of them is either exactly 5 or 4.5" long.
However, according to the following referenced site, the 5" versions were made between 19, while the 4.5" verisons were made from 1981-1987.Īlso those made between 1976-1981 were purportedly made w/L6 tool steel while those made later were purportedly made w/an unidentified "high carbon surgical stainless steel " - probably 440C as was used in the Mark II). Unlike the Mark II, apparently no accurate records were kept regarding the dating of the Mark I Gerbers. So taking in the Cordura sheath years, the "S" at the end of the serial number, plus that logo info, I'd believe it's stainless.Īs you've discovered, there are 2 versions of the Mk 1 - 5 and 4.5". Note that there is a large overlap between the start of the Vertical 2 and end of the Vertical 1 logos indicating that both were being produced at the same time.". I don't know the reason for this logo change. This logo was used during the years 1990-1998 in the approximate serial number range of I6162S to the end of normal production, N4121S being the last serial number I have noted. Forth, the letter "G" in the Gerber name does not have a horizontal portion pointing back to the inside of the letter. Third, of the two portions of the "stone" to the left of the sword, the top of the one further to the left is slightly higher than the one closer to the sword. Second, the stone part of the logo is made up of mostly triangular shapes stacked together rather than the previous 4-sided angular blocks. First, the sword axis is vertical and in line with the knife blade's long axis rather than being slanted and the sword has a more stylized look. "4) Second Vertical Logo: This is the fourth logo to appear on Gerber Mark II blades and is distinguished in several ways.
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