Pentax 67: Four LR44 as replacement for 4LR44/PX28/A544/476A battery
Pentax 6×7 - Wikipedia
HQRP 6V Battery Compatible with Mamiya 645 Pro TL / RZ67 PRO II, Pentax 67, Canon A-1, AE-1, AE-1 Program, AV-1, at-1 Film Camera + HQRP Coaster : Amazon.ca: Electronics
Help please Pentax 6x7 battery housing issue - PentaxForums.com
UNUSED 】 Pentax 6x7 67 Battery Box Holder Case For 6x7 67 from JAPAN #3342 | eBay
Pentax 67 Review - It's a Big Camera - Casual Photophile
Pentax 67 Series Battery For Film SLRs 6x7 etc 6V Alkaline | eBay