FYI, I received a rather quick response to my note to the University. I'll paste it below because it contains addtional info ... he apparently shot the earlier work with a prewar Contax II.
Vince
"Thank you for your interest in the Charles W. Cushman collection. I hope
you enjoyed browsing the collection, and in particular the images and
descriptions of his camera equipment. I do realize that the site might
imply that all of the camera equipment was used to shoot every image
from 1938-1969, but I hope that is not the case. We continue to conduct
research on Cushman and are steadily gathering new information that we
hope will be added to the site at a future date.
"Based on research I have conducted I can tell you this about Cushman's
camera/s: We know Cushman purchased the Contax IIA camera we have here
in the Archives (and shown on the website) on April 5, 1957 from Alfred
Bass camera store at 585 Market St. in San Francisco. We know this from
the receipt we have that also lists the camera's serial number (Q31762).
On the same receipt, he traded in his old Contax II camera (serial
number C88537). NOTE: The "C" in the serial number indicates the camera
was manufactured in 1936 or 1937.
"We know that Cushman owned the Contax II (C88537) at least as early as
February or March of 1948 as he sent it in for an overhaul at that time.
It is probable , however, that Cushman purchased the Contax II no later
than September of 1938 as that is when he begins shooting his first
Kodachromes.
"Please, send me the addresses of the sites you mentioned below and do
not hesitate to send me notes about any other anomalies you may find.
Also, you are more than welcome to look at Cushman's camera equipment if
you are ever in our area, just give me a call and we will set up an
appointment.
Thank you,
Bradley D. Cook
Curator of Photographs
Office of University Archives & Records Management
Indiana University
---
Dear sir or madam,
As an Indiana native who has traveled the world a bit, I was quite
fascinated and enthralled when I stumbled across your site on the
Kodachrome photography of Charles W. Cushman.
However, as a classic camera enthusiast, it should be pointed out that
his Contax IIa camera in your collection was introduced for Germany's
FotoKina trade fair in 1950, and was commonly available for purchase
through the early to mid-1960s. The other equipment in your collection
would indicate that he purchased the camera sometime in the 1950s. It's
very much the working kit of a quality-conscious camera enthusiast of
the 1950s. This is only important inasmuch as your site says the Contax
IIa was believed to have photographed the majority of Cushman's images
in your collection, whereas Cushman's 35mm work from the 1930s and
1940s, and perhaps the very early 1950s, would have been shot with a
different camera, quite possibly a prewar Contax, which was similar to
but not identical to the Contax IIa.
I can provide sources or links to more info if you need them.
Respectfully,