1974 20" SF hatch hinges
 

Ok, I am going to try this again! My '74 20' SeaCraft has piano hinges on the two batches on the casting platform and another
on the live well in the floor behind the seat! Are these original? Thanks

My question is, do you see any old screw holes where regular hinges might have been or a recessed area where the old hinges might have been installed. Pictures? I don't have a 20 however my '78 23' has original piano hinges on the two front hatches.

On my '73 20SF, the only piano hinges are on the glove box hatch on the console, and the bench seat lid. All of the deck hatches use regular hinges.

Like Don said, look for evidence that screw holes have been repaired.

Many thanks for the info! I looked for old screw holes earlier today when I removed the hatches, and I didn't see any; however, the piano hinges fit perfectly in the design of the hatch. Even the ends are curved to accommodate the hinges! I also forgot to mention that the bench in front of the console has a piano hinge, too. I will take pictures tomorrow and try to post!

Pictures would really help

http://www.classicseacraft.com/commu...l&titlesonly=0

Case solved! This afternoon in bright sunshine I could see the footprint of the old hinges! Now I just need to match them up! Thanks all for the help!