I am not sure, but I think a 20 gauge forend will also work in a 16 gauge Sterlingworth. Don't pay too much. You paid too much for your forend wood which may or may not work. Be careful.
I am sure I paid more than what I should have.....it is for my Dad so the sentimental aspect overshadowed the $ this time. The forend wood fits just right!
Thank you for the photos, Jack! That was very nice of you to do!
Thank you to everyone for the help.....this means so much to me to have this restored for my Dad.....