gibson	from 1902 to 1947,used on better instruments only
year	last#number		year	last#number
1903	1150		1925	82700
1904	1850		1926	83600
1905	2550		1927	85400
1906	3350		1928	87300
1907	4250		1929	89750
1908	5450		1930	90200
1909	6950		1931	90450
1910	8750		1932	90700
1911	10850		1933	91400
1912	13350		1934	92300
1913	16100		1935	92800
1914	20150		1936	94100
1915	25150		1937	95200
1916	32000		1938	95750
1917	39500		1939	96050
1918	47900		1940	96600
1919	53800		1941	97400
1920	62200		1942	97700
1921	69300		1943	97850
1922	71400		1944	98250
1923	74900		1945	98650
1924	80300		1946	99300
			1947	99999
A prefix numbers from 1947 to 1961
year	last # number		year	last #number
1947	A1305		1955	A21910
1948	A2665		1956	A24755
1949	A4410		1957	A26820
1950	A6595		1958	A28880
1951	A9420		1959	A32285
1952	A12460		1960	A35645
1953	A17435		1961	A36150
1954	A18665
solid bodies from 1952-1961
no numbers in 1952
first number on back of headstock is last digit of year
from 1961 to 1969, some numbers used more than once
year	#number
	more to come