How old is my radio?

Here are some ways to estimate the date of manufacture of a radio.

Cabinet style

Rectangular box with separate speaker (1923 – 1930):

George Court radio (1928) with horn speaker — Radio made by George Court in Auckland (1928) with horn speaker

Cathedral cabinet style (1930 – 1934):

Philco 89B cathedral (1933)

Tombstone or Skyscraper cabinet style (1933 – 1938):

Phlico 37-620EZ (USA 1937) — Philco 37-620EZ (USA 1937)

The tuning dial

Keyhole dial aperture (1930 – 1934):

AWA C87 Radiolette 1932 — AWA C87 Radiolette (Australia,1932)

Semicircular dial (1932 – 1934):

Rogers 960 (Canada, 1934) — Rogers model 960 (Canada 1934)

Full Circle dial (1934 – 1940):

Pilot 403B (USA 1936)

Rectangular dial (1938 onwards):

Bell Colt - Wendy — Bell Colt (New Zealand 1954)

Empire 126 (Westco) (NZ c1948) — Westco Empire 126 (New Zealand c1948)