Controller model confirmation

I am trying to confirm the model controller I have. The firmware chip (left side chip) state (c)2004 HAI 100504-01 2.5E. My controller part number is 20A01-21 with a sticker beside, possibly having a serial number on it (034000142-C7). I've been told the board is a OmniPro II by one person and another stated it's an Omni IIe.

Can anyone confirm it either way? Thanks!
 
On further inspection it appears the part number 20A01-21 may actually be a "31". In the white square the number is hand written which is rather difficult to decipher because the writing runs off the board. If the number was meant to be a 3 then the bottom half is missing. If number was intented to be a 31 then that would make it an OmniPro II, correct?
 
Based on the 100504-01 part number on the EPROM chip, the controller board is an OnQ HMS 1100. This can be upgraded to an HAI OmniPro II with an OmniPro II firmware upgrade chip.
 
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