Do Unmanaged Switches Have Firmware GS316 or GS116NA

[Sam41]

I've been asked to supply the firmware version information on some switches in use. I know it's not lsited in the specifications that came with the units nor can I find a way to query the units to ask. Is there a default OEM firmware installed which has a version available

[schumaku]

No versions or the like applicable.

[sktn77a]

The switches have different versions eg the GS105 has versions 1-5.  They have different hardware (v1-4 require a 12v 1a PS, v5 needs only a 12v 0.5a PS).  However, there is no "firmware" as such.