9 VOLT BATTERIJ BLOK GROOT - Advitek Marine Systems A.M.S. B.V.
Varta 439 - PILA SALINA 6F100 9V-4,3AH VARTA L.
439 Adaptor - Connector assembly adaptor for PP9 size battery
Paavo Leinonen on Twitter: "Observed a sample of rare PP9/6F100 #battery during weekend. Expired in 2002. Might have been used to power a clock on a sports field. https://t.co/zu614Zb66u" / Twitter