Victoreen Instrument Company started in 1928 by John Austin Victoreen, a self-taught engineer, as a group of x-ray dosimeter manufactures. He later received an honorary doctorate in science.
Victoreen is credited with building several condenser-type ionization chamber instruments in 1927 which were stored in the laboratory due to lack of need. The chamber used a carbon wall and aluminum electrode and was 1 cm3 chamber charged with a friction wheel. Glasser and Seitz made an experimental condensert-type ionization chamber with a removable chamber that could be separated from the electrometer.
Glasser turned to Jack Victoreen in 1928 to market the first commercial instrument know as the Condenser R-Meter. It was an ionization meter connected to an electrometer. It soon became the industry standard.
Victoreen provide 95% of the instrumentation for the South Pacific atomic bomb tests and became known as the “First Nuclear Company”. These would later become the first commercial U.S. ionization chambers developed by Victoreen in 1930. The first units were friction charged with a battery powered light for the meter. It was later known as the Victoreen R-meter.
[ソース]National Radiation Instrument Catalog：Victoreen - late 1920's
Dr. Otto Glasser, a radiological physicist working at the Cleveland Clinic collaborated with Dr. Hugo Fricke to produce the first clinical dosimeter - known as the Fricke-Glasser dosimeter.
John Victoreen recognized the need for a more portable device than the Fricke-Glasser instrument, and in 1927, developed what became known through the radiological profession as the VictoreenR R-Meter electrometer and ion chamber.
The Victoreen Instrument Company was founded in 1927 and continued to develop a complete line of radiation protection products for biological applications and protection of personnel.
In 1966, Victoreen Instrument Company purchased Nuclear Associates, a well-established supplier of accessories and phantoms used in medical imaging, radiation therapy and radiation safety. In 1998, the Keithley Radiation Measurements precision instruments product line was added. In December 2004, Fluke Corporation, the world leader in compact, professional electronic test tools, purchased and branded this market-leading company with Fluke Biomedical in order to complete the hospital biomedical engineering product offering.
[ソース]RADIATION SAFETY ASSOCIATES「RSO Magazine Volume 10, No.4」Vendor Profile：Fluke Biomedical（PDF）
The first CD V-700, referred to by the OCDM as the Model 1, was the Nuclear Measurements Corporation Model GS-3CD (see photos above and to right). This can be considered the granddaddy of civil defense survey meters.
Quoting a February 1955 product description of the NMC instrument: "Model GS-3CD exceeds CDV-700 specifications in size, weight (4 3/4 lb), and ruggedness. Detects betas and gammas in three ranges 0-0.5, 0-5, and 0-50 mr/hr."
With one exception, the case bottoms I have seen of the Model 1 did not have the circular civil defense sticker seen on the Model 2 (below right). The sticker on that one exception was not centered and appears to have been added well after the manufacturing date.
There seems to be a very early reference to a Model 700 in an Anton Electronics advertisement in the May 1956 issue of Nucleonics. The ad has a photo of a survey meter identified as a "700 Survey Meter." It has no visible civil defense markings on it, but it is very similar in appearance to the Victoreen Model 2 shown in the photo below right. Strange.
Visually, the Victoreen Model 2 is identical to the NMC CD V-700 Model 1. In fact, the battery holder inside the Victoreen meter is stamped Nuclear Measurement Corporation (see below)! It would seem that Victoreen must have purchased the meters from NMC and put their own name on them.
[ソース]Oak Ridge Associated Universities：CD V-700 GM Survey Meters (ca. 1954 - 1964)