This is a very rare unique piece of medical equipment looks like in the 1920s maybe 1930 the seating appears to be some type of leather and metal
1930's Body brace
KAFO Braces Polio Knee Ankle Foot Orthosis Custom Thermoplastic Metal Pair
Kafos - Norway
Customised Knee Ankle Foot Orthosis for polio with built up shoe for leg length discrepancy #kafo
Hot german womens high heel prosthetic leg below knee amputee
Prefabricated Carbon Fiber KAFO Leg Brace by Ottobock — Grayline Medical
KAFO Braces Polio Knee Ankle Foot Orthosis Custom Thermoplastic Metal Pair
LEG Carbon Fiber Kafo Polio Caliper, Size: Medium at Rs 35000 in Gurgaon
Leg Braces Kafo - Hong Kong