The Schrade clampack, as the clear sealed packaging is called, was patented by two inventors, Imperial Schrade employees Mark L. Gardiner and James Economos. When the patent issued in 1988, it was assigned to the Imperial Schrade Corporation and titled “Knife Transport/Display Package”. The patent was applied for in 1986 and received in 1988 and the first use I find is in the 1985 ISC company advertising flyer, SC-85 from 1985.
http://www.collectors-of-schrades-r....Image_0001.htm
Love them or hate them, clampacks were made to suit a particular marketing niche. They were pilfer resistant point of sale display items for large box stores such as Walmart, Sears, K-Mart etc. Boxes, as we have seen, quite often suffered shelf wear, didn't allow the product to be displayed for customers who liked to chicken eye them, but allowed less than honest customers to crow-pocket them when coon-fingering them.
Clampacks were never intended to be long term storage after the initial sale, though some of them are now becoming scarce because of users and collectors propensity of opening them. No, not the most common UH and OT clampacks, but the anniversary and bonus clampacks.
Here is the text of my clampack research posted back in '07:
Production records indicate that nine Schrade folding and fixed blade knife pattern were shipped in the then-new clampack packaging before the year’s end. So clampacked knives will date roughly between 1985 and 2004.
The clampack is the closest thing the Schrade collector has to a coin collector’s tamper proof sealed or slabbed coin from PCGS. For this reason, I believe the value of clampacked knives will climb in the future, though not for some time yet. Currently, they are undervalued in my opinion, generally selling for less than the same item in the folding cardboard box though this trend is already beginning to change incrementally.
Among the promotional programs during the mid to late1990's, green carded “Bonus Packs” appeared with a free sharpening stone, rain poncho, or other promotional item. These were editions which had no equivalent in the boxed product lines.
Here is an example of the SH3CPANN (based upon the 3 1/4" SP-3 Lightweight Lockback), the most easily found and easily affordable 100th anniversary knife even six years after the closing.
And here is one example of the bonus clampacks...
These were available with quite a few different bonus products including the sharpening stone, playing cards, mini-flashlight, compass, knife care kit, etc.
Also, when the clampacks hit the box stores, several of the previously offered boxed "Gift Sets" went into them as well. This allowed the stores to sell the sets for substantially less than the original boxed sets with felted trays and white sleves covering the SGS brown leatherette boxes.
I am yet to open a clampack and find broken or weakened springs, or to find any corrosion. I do open some of them though, usually the single knife packs like the 897UH when I need a new EDC and don't have another user handy.