Breaker Strip,Side SVCE (601R, 601F, 501R, 501F)
  601R    Use Prior to Serial #1810000.
          After Serial #1810000 No Breakers Strips
  601F    Use Prior to Serial #1810000.
          After Serial #1810000 No Breakers Strips
  501R    Use Starting With #1004775 And Between
          #M959920-M960169. Prior to #M/P1004775
          Except Between #M959920-M960169 See
          7016189
  501F    Use Starting With #1004775 And Between
          #M960170-M960319 And #M996400-M996574.
          Prior to #M/P1004775 Except Between
          #M960170-M960319 And #M996400-M996574
          See 7016189