Unusual items

[DellParticipant @dell]

I picked up another Pultra P type today to restore nice fairly complete and original along with it came a very complete box of collets & accessories but in the box are two items that were tied together that I have no idea what they are, I have been through the manual and can find nothing so probably not Pultra, one is slightly smaller than the other and the allen bolts push a slide, does anyone have any suggestions as to what they are ?
Dell

[DiogenesParticipant @diogenes]

..the pictures come up very small and it’s hard to see detail –

?could they be little adjustable ‘pot chucks’/cat-heads to allow accurate centreing of work held in a 3J scroll chuck? ..  ..?die holders?

[DellParticipant @dell]

Here are bigger pictures 

[Author]

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