ID of 3 Japanese dataplates.

Thanks all.
I did join the axishistory forum and asked there. You were all on the right track. Seems there is an older style caricature on the larger plate. It says rectifier tube on off switch. The other two are – 37A low-frequency two-stage or two-step, two-level. The third says To oil pump.
The guy who gave them to me said his Father mentioned they were off a A6M Zero. He has a larger plate from the outside of the aircraft. He just needs to locate it!
Here’s a direct link to my request and answer.
http://forum.axishistory.com/viewtopic.php?p=1881141#p1881141
Regards, Stephen.

Top three characters on the one on the left are “Sei ryuu kan”, which is a pipe (kan) which controls or governs (sei) the flow (ryuu), of, as Whitley’s noted above, something at high pressure. The lower three are “Setsu dan ki”, literally connect / disconnect device.

Lower right also contains the characters (katakana) for pump. Character on the far right is “he”, same as “direction to”. So the whole label is for something that leads to the oil pump.

Hi Vintav – the vertical label contains characters: for high pressure, connect/disconnect and instrument.
The label with the 37A prefix is likely from a radar or some electrical apparatus – it contains characters for: low circular wave 2 (number 2) section.
The lower right label contains the character for oil. We can’t recognise any of the others. Hope that helps.

Stephen !

This is better for You to see the Forum on this link:

http://forum.axishistory.com/viewtopic.php?f=65&t=113460&start=1245

This is Forum, dedicated to military History, and it have large thread, named “Translation Requests”. In this thread the Forum members from whole World ask about different Japanese things to identify them and to translate Japanese titles. And Japanese members answer on these requests – in case if they could to help.

Try that Forum. Registration is needed.