In my collection the following issues of QST is missing:

All before 1925,

In addition, I have some poor copies and I'm looking for some better ones:

July 1940
April, July, Aug., Sept. and Nov. 1955,
Jan., Feb., May and Aug. 1956,

My collection of Wireless World is not yet complete.

I think I can give up looking for vol. 2 (1914) , but I'm also looking for:
vol. 24 and 25 (1929),
vol. 29 (1931),
vol. 40 and 41 (1937),
vol. 42 and 43 (1938),
Oct., Nov. & Dec. 1939,
vol. 46 (1940),
vol. 49 (1943) ,
vol. 50 (1944),
no. 4 1950,
vol. 57 (1951),
nos. 1 & 2 1974.

In addition some poor copies needs replacing:

nos. 2-3 & 4 1963,
nos. 2 & 5 1964,
nos. 1-2-3 & 7 1966.