Can anyone identify what this is?

The reds pick this mysterious object. It could be a Ship Builders tool. Any ideas?

29 January 2018

2 minutes

This clip is from

Bargain Hunt—Series 49, London 9

The curtains go up on back garden cinema.—Series 73, Heanor 16
Duration: 04:26
Discover when cat’s eyes were introduced, when the first driving test was taken and where the first motorway was built.—Series 73, Wheels and Deals
Duration: 05:44
A collection of jewellery to "knock your socks off."—Series 73, Uttoxeter 2
Duration: 03:57
The doctor who dedicated her life to helping donkeys.—Series 73, Shepton Mallet 21
Duration: 04:37