Vinyl pressing plant which was located in Burbank, California. They began operations in the early 1960's, and closed in the mid-80s.

Identification tips:
Waddell pressings often have a large "W" etched in the runout matrix.
In some cases "WC" will be stamped instead.
Pressings for London Records will often have a "W" suffix appearing in the label matrix.
Pressings for MGM / Verve may not have any identifiable etchings in the runouts (Please refer to the section below for identification based on the size of pressing rings which appear on the labels.)

Note.H.V. Waddell Co. never pressed records for Atlantic releases, so do not mistake the "M" found in the runouts of many Atlantic releases as the "W" from this plant.

Waddell pressings had a 2.875" (73 mm) pressing ring plus another circular indent of 3.625" (92 mm) diameter - see The Moody Blues - On The Threshold Of A Dream.
2.875" rings are found from the late 60's to mid-to-late '70's, and the 3.625" rings from late '60's to early '70's.
Later, 1.25" (32 mm) pressing rings are seen from late 1976 (see Stevie Wonder - Songs In The Key Of Life) through plant closure circa 1985.