I am trying to Identify the Lewmar portlight for the '96 336 bathroom and Bedroom from Lewmar's size chart. I measured it as 15.5" x 8.125" when measuring from the inside, only when I got home did I see they wanted me to measure from the outside. Anyway this chart states it is likely a size 5, can anybody confirm?
https://www.defender.com/pdf/LEWMAR_OLD_PORT_DIMS_ID.pdf
https://www.defender.com/pdf/LEWMAR_OLD_PORT_DIMS_ID.pdf