Matrix A: VK10570 103240-1 103858-1 S (etched, S is stamped)
Matrix B: VK10570 103245 103861 1! S (etched, 1! and S is stamped)
Pressing Plant: MGM Record Manufacturing Division, Bloomfield, New Jersey
Material: Vinyl
US MGM/Verve factory sleeves (1966-68)
Matrix A: VK10570 103240-2 103858-2 (MR) ∆69153 (etched, (MR) is stamped)
Matrix B: VK10570 103245-2 103861-3 (MR) ∆69154 (etched, (MR) is stamped)
Pressing Plant: Monarch Records Mfg. Co., Los Angeles, California
Material: Styrene
Label images from BengoFury.
Matrix A: VK10570 103240-3 103858-3 (etched)
Matrix B: VK10570 103245-3 103861-3 (etched)
Pressing Plant: Midwest Record Pressings Inc., Chicago, Illinois
Label images from Alan Mansfield.
Matrix A: VK10570 103240 103858 1! S (etched, 1! and S is stamped)
I assume this symbol indicates stamper number but I can’t say for certain.