Pair of armchairs Albert Jacob tulip feet for Grosfillex - 1970

Pair of jacob albert armchairs for grosfillex. Plastic-hulled structure reinforced by a chrome steel blade resting on a 360-degree swivel steel tulip footing. Dark brown padded leather seating, backrests and armrests. The chairs are stamped model 3500 under the seat, 3600 and 73 (manufacturing date?) under the foot. Good general condition, some marks of time visible on the hull and foot, some wear marks on the faux leather.