Bottom 1964 Slim and 1958 "195" aka "Fatboy". Slim is all nickel-plated Mfg. 1961 - 68. Weight 71.1 grams. "195" was first Gillette adjustable razor. Sold for $1.95. Mfg. from 1958 to 1961. Also nickel plated and hefty at 79.9 grams. Mfg. date Slim J-1 & "195' D-4.