I came across "Notes on Enemy Bombsights" from 1942, a useful reference. But one thing struck me: none of the sights are named in this reference. Just what was the sight in the He 111 named?
Does anyone have additional sources they might recommend for these sights? UK and US sights are well documented, German and Italian, not so much (in English at least).
Being picky, Lotfe is an abbreviation for Lotfernrohr (= sighting scope, or something like that) so a generic term, not the specific model installed, if that's what you're after. The Lotfe 7c seems to have been the most common one though.