Gruen Caliber Date Table
Use this table to get a 'rough' idea of your movement's age.
These dates represent the date the movement went into production. Some movements, such as the Caliber 440, were made for 13 years. Obviously you cannot use the date in this table as THE absolute date your watch was manufactured, but it can tell you the maximum age it could be.
BIG thank you is owed to B. Cooper for his diligence over the years in researching these movements and dates.
This table started from the work of C. Cleves who published his edition in the AWCI Horological Times and later in the Gruen Master Book. The quality has jumped considerably since the early days of Gruen research.
Caliber Jewels Quality Year of Intro
21 21 Precision 1914
35 17 Precision 1910
45 17 1911
47 17 1915
50 21 Extra 1911
87 18 Extra 1920
89 18 Extra 1915
93 17 Precision 1917
94 15 1914
96 15 1917
98 15 Precision 1915
99 15 1915
100 15 Precision 1915
101 15 Precision 1915
103 15 1917
105 17 Extra 1925
106 15 Precision 1928
107 17 Precision 1927
115 15 Precision 1925
117 17 Precision 1925
119 17 Precision 1928
120 15 Guild 1916
121 15 Guild 1916
123 17 Precision 1930
124 15 Guild 1915
125 15 Guild 1915
126 15 Guild 1916
127 15 Guild 1916
130 15 Guild 1919
131 15 Guild 1919
133 17 Guild 1919
139 15 1914
140 15 1919
142 15 1919
149 15 1920
151 17 Precision 1921
153 15 Guild 1924
155 15 Guild 1924
157 15 Guild 1925
159 15 1931
161 15 Guild 1930
163 15 Guild 1924
165 15 Guild 1929
167 7 Guild 1936
168 17 1936
169 11 1932
176 17 Guild 1920
177 17 Guild 1920
179 15 Guild 1925
181 15 Guild 1932
183 7 Guild 1932
200 15 1919
210 17 1939
211 15 1939
212 7 1940
215 17 1948
216 15 1950
253 15 Guild 1926
266 15 Guild 1926
270 17 1936
271 15 1936
275 17 Precision 1947
280 17 Precision 1936
285 17 Precision 1948
290 17 Precision 1940
291 15 1941
295 17 Precision 1946
300 17 Precision 1936
306 17 1934
307 17 Precision 1932
311 17 Precision 1935
313 15 Guild 1928
315 15 Guild 1929
325 17 Guild 1930
327 15 1932
328 17 1934
329 7 1933
330 17 Precision 1937
335 17 Precision 1948
341 7 1932
342 15 1932
343 17 1932
344 7 1934
345 15 1935
347 17 1935
350 17 Precision 1938
355 17 Precision 1935
370 17 Precision 1948
380 17 Precision 1939
381 15 Precision 1939
385 17 Precision 1946
386 15 Precision 1946
390 17 Precision 1934
400 17 Precision 1935
401 15 1937
405 17 Precision 1938
406 15 1938
410 17 Precision 1939
411 15 1939
415 17 1950
416 15 1950
420 17 Precision 1942
421 15 1942
422 17 1948
423 15 1950
425 17 Precision 1945
426 15 1945
430 17 Precision 1940
431 15 1940
435 17 1940
440 17 Precision 1940
450 17 Precision 1946
455 15 1935
457 17 1939
459 17 1939
460 17 Precision 1947
465 15 1935
467 7 1935
469 17 1935
470 17 Precision 1948
475 17 Precision 1951
480 17 1951
485 15 1935
487 7 1935
500 17 1936
501 15 1936
502 7 1936
520 17 1936
530 17 1936
531 15 1936
540 17 1936
541 15 1936
580 17 1936
581 15 1936
582 7 1936
610 17 Guild 1916
612 17 1916
613 17 1916
615 16 1910
616 17 1910
626 16 1910
647 17 Guild 1910
650 17 Guild 1918
673 17 1939
675 7 1934
676 7 1934
678 17 1934
679 7 1934
680 7 1934
681 17 1934
682 17 1934
685 7 1935
686 15 1939
695 15 Guild 1939
696 17 Guild 1939
697 7 Guild 1937
700 7 Guild 1935
701 15 Guild 1935
702 17 Guild 1935
703 7 Guild 1933
704 15 1937
705 15 Guild 1925
707 15 Guild 1925
713 7 1924
716 15 Guild 1924
717 17 1926
720 21 Guild 1910
740 17 Guild 1910
754 15 Guild 1921
756 17 Guild 1920
758 15 Guild 1923
766 15 1910
771 15 1910
775 15 1910
796 17 Guild 1918
803 15 1926
806 7 Guild 1915
807 15 1915
808 7 1915
809 7 1915
812 15 Guild 1915
813 15 Guild 1915
816 15 1920
818 15 Guild 1921
819 15 Guild 1921
820 15 1920
823 15 Guild 1922
825 15 Guild 1922
826 15 Guild 1922
827 15 Guild 1922
833 15 Guild 1922
835 15 Guild 1924
839 18 Extra 1921
840 18 Extra 1918
841 18 Extra 1918
843 17 1919
845 18 0
847 18 Extra Pre 1920
849 16 1919
850 17 Guild 1920
857 18 Extra 1920
859 16 1920
870 15 Guild 1920
871 15 Guild 1920
877 15 Guild 1928
879 17 1931
881 7
885 15 Guild 1925
905 15
907 7 1935
915 15 1936
916 17 1936
917 7 1936
975 15 1939
976 17 1939
997 17 1915
1067 17 Precision 1928
1077 17 Precision 1927
1157 17 1925
1396 15 Guild 1914
1397 17 Guild 1914
1597 17 1931
1617 17 Guild 1930
3137 17 Guild 1928
3157 17 Guild 1930
3251 21 Guild 1931
3351 21 Precision 1948
7057 17 1925
8357 17 Guild 1930
117N 17 Precision 1925
210SS 17 1939
211SS 15 1939
215SS 17 1948
216SS 15 1950
270SS 17 1937
271SS 15 1937
355C 17 Precision 1935
405SS 17 Precision 1939
406SS 15 1939
410SS 17 Precision 1941
411SS 15 1941
415R 17 1950
415SS 17 1950
420SS 17 Precision 1942
421SS 15 1942
422R 17 1948
425SS 17 1946
460SS 17 Precision 1947
470SS 17 Precision 1948
480-3SS 23 1951
704SS 15 1937
8357B 17 Guild
8357SS 17 Guild
835B 15 Guild
835BSS 15 Guild
835SS 15 Guild 1925
881SS 7
Dietrich Gruen 23 Extra 1920
Ultra Ultrathin 19 Extra 1920
Ultrathin 19 Extra 1920
Ultra-Verithin 17 Precision 1920
UV 17 Precision 1920
V1 21 Extra
V1 1/2 21
V2 19 Extra
V2 1/2 19
V3 17 Extra
V4 17 Precision
V7 17 Precision
Verithin 15 Precision
(c) Copyright 2018 GruenWristwatches.com, M.Barnett & B. Cooper
