Double arms (1 Viewer)

ebay item number 140568173202
still listed on there , or just type scaffolding into the search bar and list by highest price
 
this is an old thread i know - but im looking for images or information or manufacturers guidance on old GKN mills double arms and SGB double arms, this is down to research im doing. i have tried google with no images being showed or may be im not entering the correct search names. in addition if anyone can assist with the same for :

Mils doubles
boulton drop forged couplers - normally called little giants in the north of england
Boulton pressed steel fittings

much appreciated on anything thanks guys

OW
 
what names do you know them by ? Bones, double enders,double arms , animals - any others ? there use to be the SGB type and also the GKN mills type - does anyone have any photos or technical inof on these?
 
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