Carborundum №101 pictures
I bught this hone just out of curiosity and not because I need it. Was greasy and oily but in great shape. Soaking in some solvents plus come cleaner later did the job. size 150x50x15 mm.
Interesting that there were no any wear to the hone at all. Extremely hard stone.
http://traskrom.users.photofile.ru/p.../141021521.jpg
http://traskrom.users.photofile.ru/p.../141021525.jpg
http://traskrom.users.photofile.ru/p.../141021527.jpg
http://traskrom.users.photofile.ru/p.../141021530.jpg