My Pentax K1000 ser. # is 6636745. Can you tell me what year and where it was made?

Nothing official mind you- but some folks on the pentaxforums.com put in all their K1000 info and one of the admins complied said info and came up with their own chart.

http://www.pentaxforums.com/forums/pentax-film-slr-discussion/51190-k1000-serial-number-database.html

if their information is true then your camera would have been manufactured between 1977?-1982

run From To years manufactured
1 7 5xx xxx 7 7xx xxx 1976 - 1978?
2 6 0xx xxx 6 9xx xxx 1977? - 1982
3 7 0xx xxx 7 4xx xxx 1982 - 1983
4 7 8xx xxx 8 4xx xxx 1984 - 1989?
5 4 xxx xxx 5 6xx xxx 1989? - 1997