See Labor.

The engine built by Labor but designed by M. Piquer.

"Labor-Piquer engine at The National Museum of Science and Technology in Stockholm"

-On the engine plate we see that the engine is Labor but done under license of M.P. (from Mr. Piquer).

-It had four cylinders whose axis is offset from the center of the crankshaft. See Labor.

"Engine plate detail”

“Lubrication system”

“Lubrication system control”

-Labor's lubrication system is a long piston that moves horizontally, driven by a rod from a crank of the timing gear.

“Poulain-O 3 plane, with Labor-Picker” (PiP-fmr)

-The Labor-Picker in a photo transferred by staff. It seems that it is written as Labor-Piquer.