Much agree with Sam on the first gun. Genuine Malay matchlock. These were all built very similar. If you Google Malay matchlock you can view other examples. They are not considered rare as one comes up for auction every once in a while. But they do have a value with collectors of Asian arms. This one looks like it would clean up nicely. Tedious work with all the brass intricacies. As-is, in it's attic condition, it would probably still fetch a few hundred dollars from a site like Gun B_______. To sell at a reasonable price, you need to advertise to a very large audience. Most of the collectors of Middle Eastern and Asian arms are into the blades and armour. The interest in the guns is a minority of that same group. But lately, stuff is selling for more than I would have expected. A nice find. Congratulations.
The second gun, the blunderbuss: This one is a bit of a mystery. At the moment, I'm going out on a limb and say this gun has many of the hallmarks of a Victorian Era copy. As Flint mentions, a combination of old, original parts and newly fabricated (at the time) parts. It seems the maker was attempting to copy an Ottoman style shoulder blunderbuss. The crude engraving on the stock is not Ottoman. Just generic engraving. Is the lock ALL brass ? Or is it just the frizzen spring that appears so ? Looks like the side plate sits proud above the stock and not inlet (?) The barrel, with multiple hammer marks left in place appears intentional, unless it's a casting (?). The purpose of the blunderbuss look to give the gun that WOW !!! look for decoration.
Rick