Bronze or iron weapon use already in 4500 BC

[Nordic]

As per the Oera Linda book, the 4.2 kiloyear event era usage of metal and especially iron metal weapons co-existed with stone weapons. The 4.2 kiloyear depiction is about right as to stone and metal weapons, with the iron weapon reference as noteworthy peculiar detail. That the stone and metal weapon types must have co-existed for some time is well attested. Nordic stone axe heads, for example, show positive ridge lines, modelled after the newer cast metal weapons with their flash lines. As OL MS existed already in 1845, it long predates the findings of 1300 BC Egyptian iron weapons (found in 1925) and 4500 BC Bulgarian gold-decorated stone weapons (found in 1972). The latter find is noteworthy:

• the same grave had metal (gold, copper) and stone items and weapons

• one of the weapons is a stone sword (bottom-right corner)

• the stone sword shows seemingly metal sword inspired shaping and design (cf. Nordic axes above)

• a metal sword can't be made of gold or copper, but must be bronze, iron or steel

• thus the 4500 BC Varna man had a stone sword based on a bronze or iron sword model.

A two-edged stone blade does not need a central flat ridge, as the edges can meet at midpoint. However a flat or near-flat central ridge is a thing in metal sword blades (a Dutch example). The bottom end of the Varna sword blade shows also widening, which is a hallmark of cast metal sword blade widening to a combined mini-crossguard and handle.

Hence, via logic of the stone proxy, we can be certain there existed a fashion of metal bronze or iron swords already in 4500 BC, way before the 1600 BC the standard history gives for bronze weapons or 1300 BC for iron weapons. OL narrative tells of 2200 to 2000 BC era:

[before 2194 BC] Opposite the Denmarks and the Jutterland, we had colonies with a burgmaid, from where we won copper and iron, plus tar, pitch, and some other necessities. Opposite our former Westland, we had Britannia with its tin mines.[..., after 2094 BC] The Finns have stone weapons, while the weapons of the Magyars are of copper. [...] They praised our language and customs, our cattle and iron weapons, which they were eager to exchange for their gold and silver ornaments. (OLB 048, 052)

Copper plus tin equals bronze and the OL Germanic people had direct access to iron. This is fully in line with the Varna man finding.

[Kraftr]

A new study presents evidence suggesting Nordic Bronze Age mariners were sailing ships complete with masts, rigging, and sails, by at least 1550 BC.
Huge Prehistoric Sailing Ships from Bronze Age Scandinavia