Vintage Solid Metal Darkroom Print Easel 7" x 10" Photo Printing Frame Well Made

This is a incredibly solidly made Metal Darkroom Printing Frame dating from the 1950's. Incredibly Heavyweight Construction - Looks to be all made from sold steel and weighs over 2.5kg.  The front part of the frame hinges at the top and the blades can adjust out to make prints of a maximum size of approx.  7 1/4"" x 10" .  The blades are marked with inches to allow it to be accurately set. 
The frame is in usable condition but please bear in mind it is really quite old so has signs of age , use and wear including some slight surface corrosion in places etc.  So incredibly solidly made - you are unlikely to see an item like this manufactured today. 

Please see photos for details.. Thankyou for looking at this auction..