British record company set up in 1959 by husband and wife Rita and Benny Isens. Both were Jewish immigrants and anglicised their surname to King. The had a record shop at 282 Stamford Hill, London N16 for 25 years during which time they also ran a chaotic extended family of records labels:

R&B (2) - Active 1963-1966. First issued on white label with blue type and with JB catalogue numbers JB 101 - JB 126 (although JB 121 used second colour scheme) . Issues JB 127 - JB 148 used a yellow and mid-blue label with black type (with JB 139 and JB 146 using third R&B Discs Ltd scheme).
King Records (4) - Set up in 1964. Carried all types of music - pop, soul, Jamaican, rock'n'roll and surf music
Port-O-Jam - Set up in 1964.
Prima Magnagroove - Set up in 1964. Devoted to the product of the US Prima label owned by Italian-American singer Louis Prima
R&B Discs Ltd - Set up in 1964 initially using same number series (JB prefix) as the R&B label. Issues JB 149 - JB 175, label design orange with black type and name on label R & B Discs Ltd. Catalogue numbers (1965 - 1966), MRB 5000 - MRB 5009, label design dark blue with silver type and featured a range of music from American blues and R&B, though branching out into pop later in its run.
Ska Beat - Active 1965-1967. Ska and rocksteady music. The same number series (JB prefix) as the R&B label.
Giant (2) - Active 1967-1968. The successor to Ska Beat, and mainly a rocksteady label.
Caltone - Active 1967-1968. Mainly rocksteady.
Jolly (2) - Active 1968-1969. Rocksteady and reggae releases.
Domain (2) - Set up in 1968.
Sound System Recordings - Set up in 1969. Just released five singles.
Moodisc Records - Active 1971-1972. Mostly work from Harry Mudie. The label also holds Jamaican and American releases.
Hillcrest Records - Active 1971-1972.

Publishing imprints attached in some way to R & B Discs Ltd.:
R. & B. Music

R & B Music Ltd.
Rita King Music