claim: Pakistan formally accepted a new constitution in 1973.
evidence: CD Serie 810 or ZSR 810 , earlier name CSD M 152.0 is a Czechoslovak diesel multiple unit series .. Czechoslovak. Czechoslovakia. diesel multiple unit. diesel multiple unit. It was produced from 1975 to 1982 by Vagonka Studenka .. Vagonka. Skoda Vagonka. Studenka. Studenka. Vagonka Studenka. Vagonka Studenka