One clinical study looking at essential oils for treating children with eczema found that massage with and without essential oils helped improve dry, scaly skin lesions. Children with this scaly, itchy skin problem seem to have less redness, scaling, and other symptoms if they had massage between flares.
Serial numbers on firearms in US were made mandatory by the Gun Control Act of 1968.
A total of 217,682 Star BM pistols were made between 1972 and 1992. BM serial numbers ranged from 1,226,501 to somewhere around 1,942,445. The pistols were made without mechanical variation throughout that period, but there may be a lot of different cosmetic variations depending on agency issue and commercial sales.