According to a schedule list, which Ian Parker got from the factory, batch 2315000 to 2315999 (1000 cameras) was started on 6th September 1971 with factory production code UFP1. Some of these were fitted with the Tessar lens until stocks ran out and then were fitted with the Xenar 75mm f3.5 lens as used in the Rolleicord Vb. From then on all batches were fitted with Xenar lenses..... Batch 2316000 to 2316999 (1000 cameras) was started on 25th January 1972 with production code UFP2 Batch 2317000 to 2317999 (1000 cameras) was started on 20th July 1972 with production code UFP3 Batch 2318000 to 2318999 (1000 cameras) was started on 12th March 1973 with production code UFP4 Batch 2319000 to 2319499 (500 cameras) was started on 2nd February 1974 with production code UFP5 Batch 2319500 to 2319999 (500 cameras) was started on 4th May 1975 with production code UFP6 Ian Parker states with reference to the cameras produced with production codes starting with UFP1 ³The last production of the Rolleiflex T was an order for 3500 cameras over a five year period from the British Ministry of Defence. All these cameras used a new front-plate inscribed ³MADE IN GERMANY ROLLEI-WERKE FRANKE & HEIDECKE² followed by the serial number preceded by the letter T........... After the remaining stock of Tessar lenses had been used, Schneider Xenar 75mm f3.5 lenses as used in the Rolleicord Vb still in production, were substituted. The number of ?T¹ cameras actually manufactured with Xenar lenses is approximately 4640. The over production run of this order being 1140 were sold through Rollei agents² So Sanders¹ ?T¹ was probably made in May or June 1972 I have a copy of the full schedule of 125,026 Rolleiflex?T¹ camera production which I hope to type up at some point. John On 18/03/2009 20:15, "sanders@xxxxxxxxx" <sanders@xxxxxxxxx> wrote: > I just won a Whiteface T, a very late model > (s/n T2316742) and to my surprise it sports > a Xenar taking lens -- not the reformulated > Tessar that I had expected. Did the Xenars > of the 1970s make any improvements on their > 1950s-era forebears? Any thoughts about > the Xenars on late Ts would be appreciated. > > Sanders > > >