Or, if NHS Supplies is a bit
tardy with their response (just imagine), companies such as Euro Energy* would probably be happy to provide "chapter and verse".
On your second point:- yes, very much so. In fact I wonder if some of the "modern" PP-3's actually meet the spec (in dimensional terms).
They are often a tight fit, especially in old(er) kit, and sometimes almost impossible to prize out, once they have swelled a bit. In fact, I suspect that this (actual physical size) may be the real factor in objecting to the use of some "PP-3's" in T-34's (and MS-16A's)
et al.
*
Other quality vendors of fine batteries are available.
