What year was the Polaroid Land camera serial G-100638 produced?
Polaroid has not released serial number information for most of their cameras, so it would be helpful if you specified a model. If the serial number corresponds with a Polaroid Model 80 Highlander (as it appears it may), the camera was made sometime between 1957 and 1962, possibly in the late 1950s.
There is a serial number calculator here: http://www.rwhirled.com/landlist/sx70sn.htm which returned these results: The SX-70 serial number calculator has determined the following statistics about your camera: The complete serial number you entered is B403455213. Your camera has the original SX-70 shutter electronic design ("hybrid shutter"). Your camera is probably an original SX-70 or Alpha / Alpha 1. The serial number itself is: 34552 Your camera was made on February 5, 1974 during the A shift. hope…
1900-1901 10,000 FN 1900 pistols serial # 1 to 10,000 1901-1902 21,700 pistols produced 10,001 to 31,700 1902- 1903 40,000 produced serial # 31,701 to 71,700 Aug 4, 1904 serial number 100,000 1903-1907 328,300 produced serial # 71,701 to 400,000 1907-1910 275,000 produced serial # 400,001 to 675,000 1910-1914 49,550 produced serial # 675,000 to 724,550