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Another calculation:

I have a very very used full hollow ground razor I bought on ebay for the scales only.
It have severe spine wear and the size of the blade was shorter than expected and...

Just calculated:
All my razors have an angle from 14 degrees minimum( bengall, Dorko for barber use) to 16 degrees maximum (dorko stainless, Henkels friodur- new, henckels made-) with the majority...

I dont know where you find the masurements you write as "known stardard for all razors" but are absolutely incorect.

Each manufacturers size has different spine width
A small number of razors...

The width of the spine will say you more about the size that must be the blade.

I believe that "dishonest" was an exagerated only expresion used by "Englsh" to emphasise his oppinion.
I construe in some measure the need of taping the spine from a profesional honer who has...

I totaly agree!

I dont tape the spine of my razors, even if must be to remove nicks 1-2 mm.
I like the natural wear of my razors.
Spine wear must be proportional with edge wear for blade geometry reasons.( the...