Help identifying morrow coaster brake

[Brandon plymell]

My dad has had this coaster brake for as long as I can remember. Its new in box never laced up. Its numbers are 36-13 it has a 10t sprocket. Wondering what year bike this would have been used on with what rim. Its obviously 36 spokebut is the 13 guage of spoke? I also see the r-2 which im sure is the idenity markings. Thanks for info

 

[GTs58]

Here ya go.

Letter and number note the year and quarter of production.
Example: I 3 = produced 1939 July-September

Note: many hubs are marked 36-13, this is not the date code, it notes the # spoke holes and size.

A - 1931
B - 1932
C - 1933
D - 1934
E - 1935
F - 1936
G - 1937
H - 1938
I - 1939
J - 1940
K - 1941
L - 1942
M - 1943
N - 1944
O - 1945
P - 1946
Q - 1947
R - 1948
S - 1949
T - 1950