Not exact measurements, I just want some rough ones. Were they around 90mph or 95mph or 105mph?
No, the truth is no-one will ever know. There are suggestions that bowlers before Larwood were nothing like the pace of what we know as "fast" today. Those most noted, IIRR, for their pace were the likes of Charles Kortright, Charles Harenc and Samuel Redgate. But there are hundreds of others.
It's very possible that before Larwood "fast" (ie, what we now know as 90mph or so) wasn't anywhere near as fast as it is now, and more late-70s. Larwood, in all likelihood, was the first to bowl at 90mph, but even then it's very debateable for some types whether he was any faster than the likes of Kortright and Harenc.
The truth is, even in the 1970s and 1980s and most of the 1990s, when good quality footage exists of some bowlers (Snow, Lillee, Willis, Thomson, Roberts, Holding, Marshall, Imran Khan, Wasim Akram, Waqar Younis, Allan Donald, PS de Villiers, etc.), speed of delivery was not timed accurately, and therefore
we simply don't know how fast they really were. The best we can do is guess that people had always had the ability to bowl about as quick as those who succeeded them, and that seems, to me, a reasonable thing to presume. The requirements to bowl at speed have not changed.
The only exception is Tyson. People say it'd not be possible to bowl at 105mph. If Bradman hadn't averaged 99.94 everyone, and I mean everyone, would believe that too to be impossible. The feats of Bradman could be recorded by the technology of the day; those of Tyson could not. This doesn't mean they couldn't have happened.
There are freaks in every area of sport. Never know, one day there may be another Bradman. Tyson was never timed accurately, but did bruise batsmen through pads, which no-one else has ever done, and was estimated by some people (Richie Benaud for instance) to be
notably much faster than anything else they'd ever seen. Now you can't put this into mph, but as I say - you can guess that normal "fast" (eg the speeds of Statham, Trueman, Lindwall and Miller) was about 90mph, and that he was notably quicker than this, and routinely (on that one tour if never again) beat top-class batsmen for sheer speed, and this in itself is incredibly unusual.