Lots of discussion about this at:
https://www.quadraphonicquad.com/forums/showthread.php?3234-Still-UNKNOWN-USA-release-QUAD-Lp-1975-!!!
Copy on ebay with SQ markings on the labels on both sides
MATRIX: SIDE A: AL 34156 1F AT/GP, SIDE B: BL-34156-1B AT/GP SX B.
My copy (promo copy, timestrip on cover) with no SQ markings on either side
MATRIX: SIDE A: AL 34156 1B AT GP, SIDE B: BL-34156-1B AT GP .
my copy looks like this(same seller)(including the ringwear
)
http://www.ebay.com/itm/351541604266
Side 1, almost nothing coming from the rears, nothing sounds like it was meant to come from rears.
To my ears, definitely not quad/SQ for this -1B pressing.
Side 2, totally different from side 1, lots coming from the rears, much/most is discretely in the rear or the front
so it sounds like it was placed there on purpose. The entire side 2 is like this.
Side 2 to my ears, could be SQ/quad for the -1B pressing.