More information on the wonderful and very popular Grade 1 listed 14th century church can be found here:
https://en.wikipedia.org/wiki/Church_of_St_Mary_and_All_Saints,_Chesterfield
The Champions had lost their ability to hold the glass doors closed in windy conditions. We re-tensioned and adjusted the closing speed of them which means the church can now keep its existing period door closers.
The Champion 3A's were manufactured by the Forson Design and Engineering Company Ltd around the mid 1950's.
Some readers may recognise this early patent model door check from an earlier blog post of mine, but can anyone see what aids the door spring/check in its goal or possibly put better how the door spring/check is aided?