If you are displaying a vintage frogman with all the accessories attached, be very careful.
Apart from the constant problem of the rubber drying out, items such as the knife and scabbard when attached to the leg can become just that....attached.
When trying to remove them the rubber on the suit will tear as both items have fused together.
So display the accessories beside or behind the frogman and if possible keep a small glass of water next to the figure to keep the immediate air moist and prolong the life of the rubber.
Sir Sid ( talking from experience )