https://acmestudio.com/products-site_exclusives-the_vault/Peter_Shire/T.L.E.O._Color_Test_Ballpoint/TMEO_ARCH%7C/PPS01BP/
Shop T.L.E.O. Color Test Ballpoint by Peter Shire (#PPS01BP) on ACME Studio
This pen (The Less Elaborate One) was the precursor to the "T.M.E.O" pen design (The More Elaborate One). The cap is the same as T.M.E.O, but the barrel is...