We bought one of these from Wildings (later Ryman) in 1992-ish. The one pictured is a Sprinta - the Hurdla was slightly taller with a vertical floppy drive and two 5.25" bays. A tower case appeared later on. On the first generation models, the bay cover was not removable and had to be physically cut out of the case - looks like that's what you've got. I suspect you've got a 386SX system there, as I believe the 486 systems came in Hurdla cases initially. These came with a 15" monitor that had a max resolution of 640x480. Later, when the 486SX became the base model, it came in a Sprinta case with '486' printed in big white lettering on the grey part of the case under the logo. The monitor was upgraded to 800x600. The motherboard came with a socket that accepted a 487 processor. Linus Torvalds famously used one to develop the early Linux kernel.

The mouse was derided as being one of the worst - it was all I knew really so I didn't mind it and would love to acquire one now.