Models UPP 23/4, 23/5

Made in Jena (GDR) 1965-1974

New developped projector and control desk

- 1965: UPP 23/4: Colombo, Lisbon

- 1967: UPP 23/5: Cairo (further improvements)

- 1969: UPP 23/5: Jakarta

- 1974: UPP 23/5: Brussels