No official nomenclature is positively known, but a spare candidate is Carriers, cartridge, 75 rounds, experimental. It is, in collectors terms, the 4th Issue of Carriers.
In this variation the snap fastener spigots have been replaced by simple brass studs, and the fastener crowns by "buttonholes". We haven't yet found any official documentation authorising this change, but it must exist. Other than this economy measure, these Cartridge carriers are constructed in the normal fashion. We are unsure as to exactly when this modification was introduced, and have read reports of this type of Carrier dated as early as 1915. In good original condition, please view the images to see the condition of the item, it is as you can see missing one of the studs. The item "RARE British WW1 Pattern 1908 Carriers, cartridge Economy Issue'08 webbing L" is in sale since Tuesday, January 19, 2021. This item is in the category "Collectables\Militaria\World War I (1914-1918)\Field Gear". The seller is "bananamafia-militaria" and is located in barwell, Leicestershire. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, French guiana, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Saudi arabia, South africa, United arab emirates, Ukraine, Chile, Bahamas, Colombia, Costa rica, Guatemala, Honduras, Jamaica, Kuwait, Panama, Qatar, Trinidad and tobago, Uruguay, Viet nam.