KOKEN Z-EAL 1/4" DEEP SOCKET SET (12pcs) RS2300MZ/12 MADE IN JAPAN | eBay
NTD Koken Zeal 1/4 set. The chrome socket in the middle is a 10mm Williams (Taiwan) the socket to the left is the Koken 10mm. Crazy difference in height between the tool.
Sockets – Ko-ken USA
Koken Whitworth sockets – Franz and Grubb Engine
Whitworth Socket Sets By Koken
2-3/4'' x 3/4'' Drive 12 PT Koken Socket
KOKEN 1/4" DRIVE WHITWORTH SOCKET SET - British Tools & Fasteners