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Here are some more information for Carl Zeiss Jena:

A Brief History Of Shot Glasses

A shot glass is described as a miniature glass intended for containing or measure liquor, which in turn can either be poured into another liquid composition, or in most cases, consumed directly from the glass, hence the term "a shot".

The word shot glass was first coined by the Oxford English Dictionary sometime in the 1940s. There are several legendary stories about the origins of the shot glass, but one which endured is that the shot glass has been used for more than two centuries in Italy, mainly used for drinking grappa. This liquor was sipped slowly and not downed straight.

In much earlier times, the container utilized to measure or drink a typical amount of liquor was known as the Jigger or Pony. A petite glass containing a shot of alcohol is identified as a whiskey. In the late 19th century, at the dawn of the Prohibition, many American distilleries disseminated slender whiskey glasses bearing advertisements which were etched. These glasses emblazoned with an assortment of pictures and designs are now coveted items amongst shot glass collectors.

The New York Times was the first publication to use the phrase shot glass in the 1940s; in an account concerning the attempt to standardize the volume of a shot of liquor in New York. There are also several allusions from as early as the 1800s about workers excavating canals being offered a jigger of whiskey or rum. However, the phrase shot glass only became universal a good deal later after the article was written.

There is a palpable correlation between the Prohibition and the glass; that both are directly linked with alcohol. In times before the Prohibition struck, most glasses were slim at the sides. After the Prohibition concluded, glasses for shots were manufactured with thick bases and sides.

There is several interesting folklore on the birth of the shot glass. One tale describes the glass first being mentioned in Old West Saloons; when patrons would trade bullets for a single shot of drink. Another story stated that the glass was used at dinner to contain any lead shot present in the meat (similar to spit jars used by tobacco chewers). One popular version admitted that the shot (filled with lead) was invented to hold unused quill pens, so that they could stand upright.

The word shot can also be described as dose, akin to an inoculation shot. This definitely pre-dates the application of the phrase shot glass.

Not many people are aware that the word shot was initially spelled as Schott, the namesake of German chemist and Glass expert Friedrich Otto Schott. Along with physicist Ernst Abbe and instrument engineer Carl Zeiss, they established a glassworks plant in 1884 in Jena, Germany. It is believed that this Jena glass was the first Schott glass invented. Later on, the name was shortened to shot glass when it was produced in America, and the original name was soon erased from memory.

In many countries, both single and double shot sizes are standardized.

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I have a Rolleiflex Camera and the only ID marks on it are Tessar 1:35 f=7.5cm and Carl Zeiss Jena Nr. 3302367

There are any number of possible models you could have

New Standard
Automat 1
Automat 2
Automat 3
Automat X
Automat MX
Automat MX-EVS
T

The differences between these models are, in most cases, fairly subtle, and it would take someone at least somewhat well versed in Rollei cameras to tell them apart. I will run down some of the main differences, though, if you care to know. Let me know by adding more information, and I will type it all out.

Rollei made no junk, and all are excellent cameras. The Tessar lens is excellent, if a bit soft in the corners.

EDIT:
Antoni,
Japan wasn't even making cameras that amounted to anything when this camera and lens were likely made.

The original CZ lens factory was based in Jena, Germany. After the second World War, Jenna was located in the Communist East Germany. Most of the original designers ended up in Opton in West Germany after the war, however the original factory and some of the original workers remained behind in Jena. Although the two were separate companies, both used the exact same lens designs and formulas, and for the most part their lenses were identical.

Jena lenses sometimes get a bad reputation, however in my experience, they are every bit as excellent as their Opton counterparts. I can't tell the difference between images taken with the CZ Jena Tessar lens on one of my Rolleiflexes as compared to the CZ Opton Tessar on my Ikoflex, or for that matter I can't tell the difference between either one of those and the Schneider Xenar on most of my other Rollei cameras.

DGAP-Adhoc: Jenoptik AG: Major traffic safety order of more than 12 million euros received. Capital increase of up to ...
» DGAP-Adhoc: Jenoptik AG: Major traffic safety order of more than 12 million euros received. Capital increase of up to 5,203,464 new shares approved.

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