Army Mount model 1, in recycled sterling silver 925, Special metal  with oxidation reduction properties.
Available in bulk or single unit.
The mounts as casted to be applied with pressure and glue, a good option for those who don't have machinery to turn/spin silver.
The mounts are designed thick and heavy to give enough room for adjustment and textures, the weight can be significantly reduced by filling down the walls.
Please check measurements on the images before purchase.
Notice casted pieces have a slight variation in dimensions and proportions, so measurements described can vary from the real piece.
Always work the wood of the pipe after you have the army mount in hands so you can adjust the fitting precisely.