PNEUPHONIC HORN ( AIR OPERATED TYPE B- 7- 30 ) TO WSF PT. NO. IC- 70010/ 3, PAMPHLET NO. AI- 228. EACH UNIT SHOULD BE EMBOSS/ ENGRAVED WITH MAKERS NAME, MONTH, YEAR & BATCH NO. OF MANUFACTURING AT A CONSPICUOUS PLACE. TO CLW DRAWING NO 0/ 2/ 65/ 109.