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The SOG knife was designed for, and issued to, covert Studies and Observations Group personnel during the Vietnam War. It was unmarked and supposedly untraceable to country of origin or manufacture in order to maintain plausible deniability of covert operators in the event of their death or capture.〔Pacella, Gerard (2002), ''100 Legendary Knives'', Iola, USA, Krause Publications, p 99. ISBN 0-87349-417-2.〕 ==Design== The SOG Knife was designed by Benjamin Baker, the Deputy Chief of the U.S. Counterinsurgency Support Office (CISO). A chrome-moly steel known as SKS-3 was chosen for the blade and hardened to a Rockwell hardness of 55-57.〔 The blade pattern featured a convex false edge on the clip point of a Bowie knife.〔 The stacked leather handle was inspired by a Marbles Gladstone Skinning Knife made in the 1920s owned by Baker, into which finger grooves were molded.〔〔 The blade was typically parkerized or blackened to reduce glare.〔 This was done so by applying a dark gun-blue finish (similar to those used on guns) on this carbon steel knife. The knife was carried in a leather sheath which contained a sharpening steel or whetstone.〔 The first contract was awarded to Japanese Trading Company Yogi Shokai for 1,300 seven-inch blades designated "Knife, indigenous, RECON, 7", w/scabbard & whetstone" at $9.85 each.〔 In 1966, SOG ordered 1,200 sterile knives with six-inch blades and black sheaths and in March of the following year an additional lot of 3,700 was ordered.〔 This second lot was serial numbered for accountability purposes and was designated "Knife, indigenous, hunting, 6", w/black sheath and whetstone".〔 Further knives were ordered from Japan Sword as well. The orders were actually fulfilled by a number of knifemakers and a result, the various lots had minor differences such as blade bluing color and guard color or shape. Although the SOG office based at Kadena and Yogi Shokai were in Okinawa, it is believed that only a major knifemaking source like Seki could have fulfilled all these orders, In 1986s a company named SOG Specialty Knives based in Santa Monica CA marketed a knife very similar to the original SOG knife manufactured in Seki City, Japan and marked it with the US Army Special Forces Crest.,〔 and named it the "S1 Bowie", using blued SK5 carbon steel for the blade. It was a replica of the commemorative versions of the original MACV-SOG knives, rather than the actual sterile unmarked knives used in combat. SOG made a version with an Aus8 stainless steel blade and black micarta handle in commemoration of the U.S. Navy SEALs.,〔 known as the "SOG S2 Trident". The other Vietnam replica knife is known as the "Recon Bowie" by SOG with a distinctive banana shaped 7 inch blade. This type of knife was actually the first to go into service in Vietnam. The last replica knife is the "SCUBA/Demo" which was introduced in 2001, and represents the rarest knife in this group as only one true original is reported to exist, It was created for and assigned to the USN Advisory Detachment, which operated coastal gunboats. The S1 and S2 knives were manufactured by Hattori of Seki under contract to SOG Knives USA from 1986 to 2005, after which SOG shifted to Taiwan manufacture. Hattori also manufactured the three commemorative SOG bowies for Boker, for sale in the European market. Replicas of the SOG knife have also been made by Al Mar Knives, Ek Knives, Tak Fukuta for Parker, and Strider Knives.〔 SOG also contracted with Kinryu Co. Ltd of Seki Japan to manufacture the Recon Bowie and the Scuba Demo until 2007. None of these knives, however, are currently used by any branch of the US Military in an official capacity. Original models are extremely valuable collector's items among both knife collectors and militaria collectors. The later replicas are also in high demand by collectors, especially the early ones made in Seki. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SOG Knife」の詳細全文を読む スポンサード リンク
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