Hayward HP50A - Reading Serial Numbers

Reading Serial Numbers
48
Beginning 2005
21121607 = Common to all ID tags.
21121607
= Plant of manufacture:
100 = Canada
110 = Pomona, CA
120 = Clemmons, NC
130 = Nashville, TN
21121607
= Year & Month of manufacture:
402 = 2004, Feb
405 = 2004, May
501 = 2005, Jan
607 = 2006, July
000717035 = Manufacturing ID
21121607 000717035