One method of ascertaining the originality of antique coffee grinder parts is to contact a hobbyist group like the Association of Coffee Mill Enthusiasts via email. Additionally, retail websites such as Javaholics, Old Coffee Roasters and Old Coffee Grinders assist in authenticating and providing replacement parts.
Generally, hobbyist groups like the Association of Coffee Mill Enthusiasts specialize in recognition of antique coffee mills, including the individual working parts of these grinders. The A.C.M.E stipulates that it focuses primarily on American-made mechanical coffee grinders; a European chapter of the group based in France is more apt to be able to answer questions about European coffee mills. "Millaholics," as the members of the group refer to themselves, attempt to share knowledge on identifying different brands and models of antique mills, as well as offering advice on how best to purchase replacement parts during repair or restoration. Established in 1994, the group boasts a membership of 200 people located in the United States and other countries, as of 2015.
Retail websites such as Javaholics, Old Coffee Grinders and Old Coffee Roasters, all members of the A.C.M.E., focus on sales of antique coffee paraphernalia, including mills, roasters, percolators and brewers. Categorization on the retail websites divides antique mechanical coffee mills into several types: box, wall, double wheel, side, clamp, canister, post and lap grinders. These different forms vary by the location of the cranking handle, input, output and grinding mechanisms, as well as whether they are mounted or free-standing.