It's clear that the Antikythera device is some kind of astronomical/astrological instrument. It's also clear that the means to mass-produce such instruments did not exist when it was made. Probably one man's lifes' work, and unique even in its' time.

I'm affraid the Saqqara bird is just another ritual object, probably made to honour Horus. The artefact itself is too heavy and unstable to glide if thrown. Had it had any piercing where a rope or thong could be attached, I'd have said it might be a bull-roarer.

The Hammer might be as lod as Iron Age, but it probably either Roman or Medieval.

It's difficult to see how the Baghdad Batteries could have been anything else. Though I'd argue that the limited amount of charge would render it useless for industrial/crafting purposes. On the other hand, if it could produce a tingle, it might have been used as some kind of therapeutic device.

As to the Piri Reis Map, the extent of geographical knowledge avaiable at any given historical period is always unclear. From the private rutters of European pilots to the hidden knowledge of the Druids, nobody is sure who knew what and when! So much information wass kept secret either by the plethora of Guilds and Brotherhoods, or by rival governments, that there may have been hundreds of such documents once, This one just survived.