Type LD126SS57. Windings and limit switches have been measured with an ohmmeter. The wires for external connections are short in the picture; it's easy to change them to any length, there are screw terminals under the cover. The piston moves smoothly.
Supply: 3-phase 380 VAC 1.2 A 50/60 Hz
Required power: 400 W
Force: 2500 N
Stroke: 300 mm
Speed: 16 mm/s