The holes and laces are present on the B17 Imperial. It's the one with the slit on the top. The B17 standard does not have holes or laces. The bolt is on all B17's, and as mentioned above already does not require tensioning until down the road a long way.

I run a B17 Imperial on my commuter, and a Brooks Flyer Imperial on my touring rig. The Flyer is the one with the springs, and I can highly recommend it if you don't mind the extra weight.

Edit: BTW I highly recommend the B17 also. But it's your butt!