supply of main spring assly. of pantograph amain spring assly. of pantograph a, main spring assly. of pantograph am-12 consisting of ( i ) main spring -sil ref.no. so221137501, m / s gsec pt. no. gsec / panto / 126 and m / s contransys pt.no. c0610 ( ii ) spring holder-sil ref no.so221139101, m / s gsec pt. no. gsec / panto / 079 and m / s contransys pt. no. co620 ( iii ) anchored plate- sil ref.no. so221136801, m / s gsec pt. no. gsec / panto / 125 and m / s contransys pt.no. co630 ( iv ) screw-sil ref.no. so222137202, m / s gsec pt.no. gsec / panto / 010 and m / s contransys pt.no. c0830 each unit should be emboss / engraved with makers name month, year and batch no. of manufactruing at a conspicuous place. smm-d ( d ) itarasi , madhya pradesh 1.00 numbers smm-d ( d ) , new katni jn. , madhya pradesh 91.00 numbers => limited