This is a beautiful & heavy duty “Odin” guitar strap from LM Products!
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Here is some more info from LM:

Rugged belt-weight leather
Antiqued Brass Rivets
Built to last. Forever.
Solid Brass Rings
Available in Black or Brown
Length: 47″ – 61″
Width: 2.5″

By hammer, hand, and blade forged from simple tools – these indestructible leather guitar straps channel the spirit and strength of the sea-faring adventurers from centuries ago. Each guitar strap in the series features thick belt-weight leather, metal hardware, and strength from simplicity.