That is correct , it is a printing block.
Finding a similar one would be hard, because of the fact that these blocks were specially made for (and by !) a printing compagny in order be printed . That can be a book, a single page, a newspaper, what ever.....
I can show thousands printing bloks but never (exeptions do exist!) two similar ones.
Finding the print is almost imossible to do, if you don't have any references, mostly marked on the block or the paper wrap in wich they were kept (if kept!).
They were usualy recycled quiet rapidely after being used.
cheers
|<ris