KV Store Eventual Consistency

As described the KV Store is eventually consistent, with conflicts solved using last write wins. I’m curious how this is implemented and how that affects applications that might write to KV Store in bursts. How accurately are writes timestamped? If two writes occur within a couple of ms of each other in different places, are they guaranteed to be applied in the correct order?

It would be nice to have a number, eg if Cloudflare uses system time to generate the timestamp, that system time is kept accurate to within n units across data centers.