Your frame number ends in 137 (model F6 size 19")
It makes me think this might have been something removed mid way through the F6 run. Mine is F618048, so it's a bit earlier than yours. Think Neill's F6 is nearer to my frame so it might be worth checking to see if his has rack bolts.
Would imagine a company as small as Pace would implement changes during a model as well as when one changes though – that might be the answer