@eurolock fan:
That looks like a standard simplex profile Lockwood keyway...
"American" Lockwood is still producing locks... They are just an obscure older brand at this point in time that has been forgotten for the other manufacturers who are all divisions of a few bigger multi-national-conglomerate corporations... Such as Assa-Abloy, Ingersoll Rand, Black and Decker and Stanley...
Lockwood Industries, Inc.
1100 Corporate Drive
Burlington, ON L7L 5R6, Canada
(905) 331-3008
http://www.lockwood1878.comAll they have up on their website is catalog cut sheet portions, no technical information at all...
Many large institutions back in the day used to use 6 or 7 pin systems using Lockwood sectional keyways...
~~ Evan