Unbranded SK 1-7/8 Taper-Lock QD Bushing it is in a Martin box but since it is used and does not have a Brand stamped into it I don't know the manufacture this is how it was when I got it.

 

 

 

 

This is surplus to a now closed factory that kept spare parts on the shelf the boxes/parts may show shelf wear and have some dust on them.

 

[Please Look at all the pictures they are part of the description]