What model knives have been in more or less continuous production by the SAME company for the longest time? -The Opinel in its current form (minus the locking ring) has been in production since 1897, I believe. -The Higonokami by Nagao Kanekoma has been made since around 1894, although their website says the blade shapes have evolved, so I don’t know if that counts. -Okapi has been in business since 1902, and I believe the 907e was among their original offerings. The company has changed ownership and location, but the South African buyers purchased the German tooling and machinery as well as the name, so maybe that counts. -The Douk-Douk has been in production by Cognet since 1929. (Correct me if I am wrong about any of this) These are just from the ones I own. Any other ideas?