ear code is the second letter of a two letter date stamp. The first letter (A-L) represents the month, January through December. This method repeats 3 times, beginning in 1921, repeating in 1935 and 1949.
| Code-Year | Relevent Events & Products | Year |
|---|---|---|
| M-1921 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; B Shield typically on the shaft of wrenches. |
1921 |
| N-1922 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; B Shield typically on the shaft of wrenches. |
1922 |
| O-1923 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; B Shield typically on the shaft of wrenches. First year for Chrome Vanadium Tools |
1923 |
| P-1924 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; B Shield typically on the shaft of wrenches. Chrome Vanadium Tools |
1924 |
| Q-1925 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; By mid-year 1925, the B Shield is no longer on the shaft of wrenches. Chrome Vanadium Tools |
1925 |
| R-1926 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; the B Shield is no longer on the shaft of wrenches. Chrome Vanadium Tools |
1926 |
| S-1927 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; Chrome Vanadium Tools |
1927 |
| T-1928 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; Chrome Vanadium Tools |
1928 |
| U-1929 |
Bonney B Shield in the middle of the "Bonney" stamp; "Made in U.S.A"; Chrome Vanadium Tools |
1929 |
| V-1930 |
Bonney B Shield in the middle of the "Bonney" stamp for at least part of the year and disappears between mid 1930 and early 1932; "Made in U.S.A."; Chrome Vanadium Tools |
1930 |
| W-1931 |
Bonney B Shield in the middle of the "Bonney" stamp disappears between mid 1930 and early 1932; "Made in U.S.A."; Chrome Vanadium Tools |
1931 |
| X-1932 |
Bonney B Shield in the middle of the "Bonney" stamp disappears between mid 1930 and early 1932; "Made in U.S.A."; Chrome Vanadium Tools; TuHex |
1932 |
| Y-1933 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; TuHex |
1933 |
| Z-1934 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools |
1934 |
| M-1935 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; TuHex |
1935 |
| N-1936 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; TuHex |
1936 |
| O-1937 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; TuHex |
1937 |
| P-1938 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; TuHex |
1938 |
| Q-1939 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools |
1939 |
| R-1940 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools |
1940 |
| S-1941 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools; Most tools Plain / Cadmium finish due to WWII |
1941 |
| T-1942 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools; Most tools Plain / Cadmium finish due to WWII |
1942 |
| U-1943 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools; Most tools Plain / Cadmium finish due to WWII |
1943 |
| V-1944 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools; Most tools Plain / Cadmium finish due to WWII |
1944 |
| W-1945 |
Bonney "Made in U.S.A."; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools; Most tools Plain / Cadmium finish due to WWII |
1945 |
| X-1946 |
Bonney "Made in U.S.A." phased out to "U.S.A" in late 1946; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools |
1946 |
| Y-1947 |
Bonney "Made in U.S.A."phased out to "U.S.A." in late 1946; Chrome Vanadium Tools; Zenel Tools; Bonaloy Tools |
1947 |
| Z-1948 |
Bonney "U.S.A."; Final reference to Chrome Vanadium Tools in 1948 Hardware Store Catalog; Zenel Tools; Bonaloy Tools |
1948 |
| M-1949 |
Bonney "U.S.A."; Chrome Vanadium Tools no longer in production; Zenel Tools; Bonaloy Tools |
1949 |
| N-1950 |
Bonney "U.S.A."; Zenel Tools; Bonaloy Tools; "Streamline" Wrenches; Possible Bon-e-Con Tools |
1950 |
| O-1951 |
Bonney "U.S.A."; Zenel Tools; Bonaloy Tools; "Streamline" Wrenches; Possible Bon-e-Con Tools |
1951 |
| P-1952 |
Bonney "U.S.A."; Possible Zenel Tools; Bonaloy Tools; "Streamline" Wrenches; Possible Bon-e-Con Tools |
1952 |
| Q-1953 |
Bonney "U.S.A."; Possible Zenel Tools; Possible Bonaloy Tools; "Streamline" Wrenches; Bon-e-Con Tools |
1953 |
| R-1954 |
Bonney "U.S.A."; Possible Zenel Tools; Possible Bonaloy Tools; "Streamline" Wrenches; Bon-e-Con Tools |
1954 |
| S-1955 |
Bonney "U.S.A."; Possible Zenel Tools; Possible Bonaloy Tools; "Streamline" Wrenches; Bon-e-Con Tools |
1955 |
| T-1956 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1956 |
| U-1957 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1957 |
| V-1958 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1958 |
| W-1959 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1959 |
| X-1960 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1960 |
| Y-1961 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1961 |
| Z-1962 |
Bonney "U.S.A."; "Streamline" Wrenches; Bon-e-Con Tools |
1962 |