1 General Information

Serial Number and Series Letter Information

?From 1980 to 1996, only numbers 600000 to 999999 were used.?Refer to Series Identification for the implementation date of series letters on sections and units.?The serial numbers of sections are on the serial plate on the wireway door. On special width sections, the nameplate is located on the section door. ?The serial numbers of units are on the nameplate on the bottom of the units.?SCI sections or units will have a series letter after the unit or section catalog number.?In late 1995, some SC, SC-II, and PE orders were entered on PASSPORT. Bulletin 2100 Year Factory Order No. Serial Numbers Series Bulletin 2400 Series Units Start End Start End Section Unit 1971 704403 807499 959060 971209 A A None 1972 807500 121409 971210 983266 A A None 1973 121500 346999 983267 996532 A A None 1974 347000 539999 996535 999946 A128502 A483339 A A None 1975 540000 719199 A483344 B677442 A A None 1976 719200 933199 B677452 C933199 A-B A-B None 1977 933200 268699 D933200 D268699 B B None 1978 268700 526199 E268700 E526199 B B None 1979 526200 748699 F526200 F748699 B-C B-C None 1980 748700 898049 G748700 G898049 C C None 1981 898050 661299 H898050 H661299 C-D C-D-E None 1982 661300 804249 J661300
[1] J804249
[1] D-E D-E-F-G None 1983 804250 948440 K804250 K948440 E-F F-G None 1984 948441 693587 L948441 L693587 F F-G-H-J None 1985 693588 849069 M693588 M849069 G H-J None 1986 849070 612263 N849070 N612263 G-H-J H-J-K None 1987 612264 791331 P612264
[1] P791331
[1] J K None 1988 791332 991197 R791332
[1] R991197
[1] J K None 1989 991198 834534 T991198
[1] T834534
[1] J K None 1990 834535 704948 W834535
[1] W704948
[1] J-K K-M None 1991 704949 995816 X704949 X995816 K M A 1992 995817 732348 Y995817 Y732348 K M A-B-C 1993 732349 773410 Z932349 Z773410 K N A-C 1994 773411 795559 A773411 A795559 K N-P A-C 1995 795560 818971 B795560 B818971 K N-P A-C 1996 818972 824311 C818972 C824311 NPR624 QBH320 CNPR624 CQBH320 K-L P-Q A-C D 1997 824312 N/A D824312 N/A QBH321 RPH250 DQBH321 DRPH250 L Q D 1998 RPH251 TDQ341 ERPH251 ETDQ341 L R D 1999 TDQ342 VZM602 FTDQ342 FVZM602 L R D 2000 VZM603 XWY931 GVZM603 GXWY931 L T D 2001 XWY932 BDPW81 HXWY932 HBDPW81 M U D 2002 BDPW82 CBJD56 JBDPW82 JCBJD56 M U-V D 2003 CBJD57- KCBJD57 M U-V D
[1]Prefix letters I, O, Q, S, U, and V are not used.

4