Found in our garden plot today - we think it's an old horse harness buckle, but just aren't sure. Markings say "solid brass" but nothing more - cleaned a bit past this
Buckles - Snaps - Chain - Harness Hardware
Antique Brass Horse Harness Buckles - Set of 3 | Chairish
Buckles - Snaps - Chain - Harness Hardware
Amazon.com : Black with Red Trim Leather Gypsy Horse Driving Harness | Fitted with Buckles & Stainless Steel Fittings | Available in 5 Sizes - Full, Cob, Pony, Shetland & Mini | Leather | (Mini) : Pet Supplies
SOLID BRONZE HORSE HARNESS BUCKLES AND RING - HARDWARE | eBay
Solid Brass Conway Buckles Harness Western Horse Bridle Tack Belt 25mm : Amazon.ca: Home
Natural Horse Harness Buckle
Driving Harness - What are all the parts called? – Riding & Harness Stuff
Vintage Horse Harness Large Brass Buckle Solid Tack Belt - Etsy UK | Horse harness, Brass buckle, Vintage horse