Can anyone identify this SCSI cart for me?

[Lex]

It's not the one Floid linked for sure, here's some internal photos of that: http://amiga.resource.cx/photos/amigoshd

It's not ALF either, because none of them used the 5380 controller IC.

Pea, your controller is autobooting so it has AutoConfig IDs. Read the IDs with ShowConfig / SysInfo / AIBB and then the manufacturer can be easily identified.