This aluminum and copper host is always fascinating, but it is dated, I only know two people who can make it,
TringHongPuok - Lifetime17, maybe I forget Tantung? then there are three people.
This type and form of pointer were Alaskan favorites in a long-gone time.
Even the one you sell for $90, all in heavy brass and copper, is the work of one of the three mentioned above.
[NDB7875 is a 3W 445nm diode not 450nm]