Case dated 1953 and the 17J movement is dated 1952. Yellow gold plated case with black dial sporting 3 diamonds. This configuration is a first for the database.
Based on previous research as seen here, There were 4 Launcelots; two designated as "A" and 2 as "C". We can see that originally in 1954 there was
30175-Y (yellow w/white dial) listed as "A" and 30177-Y (yellow with black dial) listed as "C". Both models priced at $95.
Then in 1955, 30179-W "C" appears(white with black dial).
Based on prices and model numbers, it appears that the yellow versions of both A and C were initially priced at $95 and followed by white gold versions priced at $100, with the white version of "A" disappearing in 1955?
The "A" variant morph seems a little more confusing, but the "C" is pretty straightforward.
Model 30177-Y is variant "C" Yellow with black dial
Model 30179 - W is variant "C" White with black dial
Model 30175 - Y is variant "A" Yellow with white dial. This one appears to have used the same number for 2 model "A"'s ($95 and $100). Logically the difference was case color and white case was dropped quickly leaving yellow? Are you confused yet?
To avoid confusion in the future, should these be broken down by model number as well as variant letter? Yellow and white Launcelot "C" have distinct model numbers.
If so, I would designate subject watch as
Launcelot 30177-Y "C" and white case black face examples as 30179-W "C".