The information that I have been able to find is based largely on the WAFL Football Budgets (WA's equivalent Footy Record, which I have collected every issue back to 1954), Westside Football newspaper (1979-1997) and various club history books. I have also written to WAFL clubs asking for their input and confirmation, but only a few clubs have replied.
Anyway, the following images are what I have been able to find so far. I have combined each club into a single image for the purpose of displaying on this board as it would be very time consuming to post almost 200 separate guernseys individually. Some of the guernseys may look the same as an adjacent one, but they vary slightly with collars, jumper numbers, etc.
Straight off the bat, I do not claim to have the same 100% accuracy of Mero's website, but I am confident that it is pretty close. Also, given that lack of info, I have also assumed that jumper numbers were introduced in 1912 (one year after the VFL), but I am happy to be corrected. As always, I would welcome any feedback or errors.
Swan Districts
(1) 1934-1941, 1943-1944 (2) 1945-1946 (3) 1947-1948 (4) 1949-1950 (5) 1951-1953 (6) 1954-1960 (7) 1961-1972 (8) 1973-1977 (9) 1978-1981, 1992-1994, 1997-1999 (10) 1982-1984 (11) 1985-1991, 1995-1996 (12) Pre-Season 1993-1996 (13) 2000-2002 (14) 2003-2007 (15) One-off Promotion for Kicking Goals Youth Program 2006 (16) Clash 2006-2007 (17) One-off Promotion for Kicking Goals Youth Program 2007 (18) 2008-now (19) Clash 2008 (20) One-off Promotion for Haydn Bunton Jnr Cup vs Subiaco 2008 (21) One-off Promotion for NAIDOC Aboriginal Week 2009