An antique heavy forged iron skeleton key with ring bow. Solid post stem and detailed collar. Barrel diameter 9mm. Would have been used for heavy furniture, doors, etc.  It measures approximately 13cm long. Nice old key. I am not an expert in antique keys; was the middle 'bit' as long as the other two and it has broken or was it always that short? Any other wear is in keeping with age and use. Please see all the photos as they form an important part of the description. Thank you for your interest.