Help to identify this deba

[valdim]

Hi there,
I saw recently this deba knife on an online market.
Pls, adentify the manufacturer and eventually - the value.
What does the kanji say?
Thanks in advance.

 

[valdim]

Hey? Nobody can identify the manufacturer and/or other info about the knife?

 

[blokey]

関龍作 Seki Ryusaku

 

[valdim]

Seki Ryusaku

Thank you, @blokey !