Hi, I know it is along time since you posted about the above,but the letterhead is still in your album so I assume you are still interested.I only joined today,finding your post,but I am a member of the family,but not close.I do have a catalogue
and article written by Frank jnr.but its not much.They did have
a very large operation in Russia but lost it all in the Revolution,
and old Frank had a memorial erected to him in Latvia I think because of his efforts to save his staff-it is on the net.He also took out many patents for his inventions,some of which are on the net.He also was in a Law case,Reddaway v Baughan which is still a precedent used today in cases of "passing off"or copying . Hope this helps-reddersthemole