Help with identification of these razors would be appreciated :)

three razors I'd like to get some more info about if possible:

1) ERN 121: I can't seem to find anything about that (121) model.. blade looks 5/8, pics below
http://shrani.si/f/42/6t/3ZVmsieh/20...5-mihacrni.jpg

http://shrani.si/f/t/1K/3Qq2oZY4/201...5-mihacrni.jpg
http://shrani.si/f/C/Po/3JGIq0Hd/201...5-mihacrni.jpg

2) Hanns Konrad Brux/Solingen 8701 (same here no particular info on this one), blade probably 6/8?, scales have distinct sulfur smell
http://shrani.si/f/X/12w/2CRVKEKj/20...6-mihacrni.jpg


http://shrani.si/f/41/ls/4tf3adLk/20...6-mihacrni.jpg

3) Now this one has pretty worn labels , all I could make out is a hammer sign and "**** something son" scales pretty beaten, my guess would be horn
http://shrani.si/f/11/130/3Shm2rNh/2...7-mihacrni.jpg


http://shrani.si/f/2O/oA/4Fr9rXbv/20...7-mihacrni.jpg

Nothing on the last two. But Ern is still in business I believe. That is what one web site I go on says. You may be able to contact them and get some information.

Last one looks like a George Johnson & Co.

Some details in this thread.

thanks for your replies :)..
@Oscroft: yes I believe the third one is George Johnson & Co, probably the same as the one in the post you shared, it originates between 1810 and 1850, got the info but forgot to share in this thread
@bouschie: good idea, I'll try to find a contact of the ERN (although I'm not sure they still exist)