Pantograph Type Am 12 Complete With Throttle Valve, Main Spring And Other Accessories Without Servomotor And Foot Insulator, M/S. Sil Ordering Ref. 22110001 For A.C. Loco.With Metalised Carbon Strip As Per Rdso Technical Circular No. Elrs/Tc/ 0071 2001 [Rev. 0 ] In Place Of Silicon Manganese Steel Strip.Each Unit Should Be Emboss/Engraved With Makers Name, Month, Year And Batch No. Of Manufactuing At A Conspicuous Place.