Cooke S4 (/i) 32mm Front Glass Replacement:
Which way does the glass go in the lens?
This information is for qualified technicians only; do not attempt the replacement if you do not have experience in handling the glass properly.
This one is easy, the glass is symmetrical so it does not matter which way you put a replacement glass. However it is always a good practice to keep the glass in the same position as it originally was when the lens is serviced. A small pencil mark on the very edge may be needed to keep track of the relative position.