Catalogue Group A side/B side Language
Number
PCM 002 The Lulus Band Ni Thoni Andu Anini/Belida Kikuyu
PCM 003 The Lulus Band Njohera/Muiritu Muthaka Kikuyu
PCM 007 Mamicha Boys Band Wairimu/Airitu Mwendaga Atia Kikuyu
PCM 50 A: Chania Sisters Mawatho Ma Mama Chiru/Wari Wakwa Kikuyu
B: Chania River Boys
OLS 01 The Mechanic Boys Sammy/Uka Coka Murata Kikuyu
MSR
MSR clearly stands for Mamicha Sound Recordings and the whole operation appears to have been owned and run by Mike Njenga Mamicha (The Wonder Boy) as he modestly credits himself on PCM 007.
Thanks to Sofiane of Groovy Record in Paris, who supplied details of PCM 50 in November 2010 and PCM 007 in June 2013.
Thanks, too, to Fredrik Lavik who posted details of PCM 002, PCM 003 and OLS 01 on his Afro7 website in July 2016. All three feature compositions by Daniel Kamau.