The 150mm Xenotar 2.8 actually proceeds the 1956 45 Technika IV (1956-1963) and was available on the 45 Technika III (1946-1956).
The first Xenotar lenses are in 80mm length and are found on the Rolleiflex 2.8C in Late 1952. The 105mm for 6x9 and 150mm for 4x5 came a year or two later, I don't have an exact date but the serial numbers begin in the 3 millions indicating around 1954, and they end in the 10 millions about 1969.
The 150mm Xenotar is prominent in Linhof marketing/ advertising from about 1955 appearing on the Technika III ads in the first volume of the Grossbild Technik magazine.
When the IV is introduced in Koln at Photokina in October 1956 it is shown with the 150mm Xenotar lens, and it is prevalent in the marketing of this camera throughout the rest of the 1950's.
In addition to the 1969 catalog David Lindquist notes Laflex also has a 1956 pricelist which lists the Xenotar 150mm.
https://drive.google.com/file/d/0B50...9fqioMrWueoqbw
The Zeiss lens set came out first for the Linhof 23 III about 1954 as well, but the 45 lenses only showed up in the last days of the III and the beginning of the IV in 1956.
1954 +/- 6 months seems to be the sweet spot for the Arrival of the Xenotar 150mm so any any announcement of the arrival should be looked for here. Linhof made a series of small informational booklets called Linhof Information that preceded the Grossbild Technik magazine of 1955. They were only in German and Laflex has the first 4, starting in 1951, on its site, however issues 5,6 & 7 are likely the ones that contain the info we need. I have tried but so far not been able to locate these issues...
Attachment 237246 Attachment 237247 Attachment 237248
Bookmarks