Antique maybe just vintage 4+" cast iron catch. Not sure of application. It appears to be a combination catch or latch and pull for a gate or small barn door. Refer to pictures as your complete description as to for condition and dimensions. Simple but in good condition.
If there is more specific information that I can provide feel free to email me. Need more pictures? No problem just let me know what you need.
Please check measurements and photos carefully before you buy.
G-49