I was thinking the same, could it have been a Leica III? Do you remember what the camera looked like?
And the lenses (like folding into the body or not, screw mount or not)?
Here is info about the Leica IIIf (1950-1957)
http://www.kenrockwell.com/leica/screw-mount/iiif.htm
Here is info about the Leica M3 (1954-1967)
http://www.kenrockwell.com/leica/m3.htm
If it was 1953, I'm assuming it would have been a Leica IIIf or an older screw mount version, which were also still available. For instance, the Leica IIIc was produced in 1940-1951, but could still be available new in some stores in 1953? Same as
the Leica IIf (1951-1956)?
Maybe you have an old picture of him with that camera?
BTW: This is what
Ken Rockwell wrote about the Leica timeline in his article about the elder Leica IIIa:
"We call this a LEICA IIIa today, while when new it was sold as the LEICA AUTOFOCAL CAMERA MODEL G.
AUTOFOCAL means that focussing is automatic: just align the superimposed rangefinder images, and the camera is in focus. Simpler cameras demanded that you guess, tape-measure or use a separate rangefinder to measure the distance and then manually set it on the lens' distance scale. With this LEICA, focus is automatic with no need to look at distance scales.
This Model IIIa of 1935 adds the 1/1,000 shutter speed to the previous Model III (a.k.a. Model F) of 1933 , which it replaces.
The IIIa only came in chrome as shown here. If you see a black IIIa, it could be an earlier model III which LEITZ cheerfully updated to the IIIa.
The newer IIIb put the rangefinder and viewfinder windows closer together, and replaced this IIIa in late 1938.
The popular IIIc (1940-1951) added many small internal improvements, like a much more adjustable shutter system and better baffling to reduce film fogging.
The most popular IIIf (1950-1957) added flash synchronization.
The IIIg (1957-1960) added a 90mm frameline in the finder."
So, my best guess would be a Leica IIIf.
Here is an image with the Leica family tree: