06-10-2014, 09:12 AM
Details of the Philips locktal types with the suffix "21" are all given in this link, it's an English version from the Philips Technical Library.
http://frank.pocnet.net/sheets/046/suppi...I_1949.pdf
For what it's worth I am now thinking that the "21" (Philips) and the "71" (Lorenz) suffixes are just their respective numbering systems as the valves appear so far as I can make out to be identical.
Lawrence.
http://frank.pocnet.net/sheets/046/suppi...I_1949.pdf
For what it's worth I am now thinking that the "21" (Philips) and the "71" (Lorenz) suffixes are just their respective numbering systems as the valves appear so far as I can make out to be identical.
Lawrence.
