According to the seller, it has a 4 pin mini din.  From what I know, a 4 pin is for old Apple stuff, AKA the ADB port.  I didn't know Lexmark manufactured peripherals for Apple, but who knows.  Anyway, I bought one, and I'll see what I get.  
There's also ADB to USB convertors, one of which I'll get if this is ADB.  
Also first post here.  Been lurking here for ages, love all the info!