Bumping this older thread.
I am just getting into Bechuanaland, and purchased a few recently. My latest is a Scott 7 (SG 6). This seems to have a much wider overprint than my Scott 5 (SG 4), both of which are shown below. I passed over several other 2p, all of which had narrower overprints.


Notice how the B and S in British are a bit "high" compared to the other letters. The top of the S seems squished. The t also seems to have quite the hook in it.

A width variation is not listed in SG. I am voting on a Fake overprint. Any comments?