tender for sandwitch mounting for wam4 loco to drg.no. elw/bsl/1/wam4/1/69.074 based on clwdrg.no.01/1/25/11 alt-6, material conforming to rdso specification rdso/2014/el/spec/0115 (rev-o).( thisis shelf life items and should be procured with staggered delivery period. supplier to mention /print date ofmanufacturing on the item & item to be supplied within 90 days of manufacture date. ) .