The glass bowl (Object no. 2) and the so-called Antikythera mechanism (Object no. 1), both come from the Antikythera shipwreck, the first underwater wreck examined in the Greek territorial waters. Greek sponge divers who retrieved many artefacts from the site back in 1900 used an old breathing apparatus - one that you can see at the beginning of the movie The Big Blue (1988).
Today, research at the site continues with much-upgraded equipment, the so-called Exosuit (currently Nuytco Research).
For those, who are in Athens, Greece, B. Foley, the co-director of the current research at the site, is presenting the results of the new investigations tomorrow (March 16, 2018, at 7 p.m.) in the Lecture Hall, Acropolis Museum, Dionysiou Areopagitou 15.
RE: Identify these objects