# The scheme uses a 205 BC epoch but the object was made later, in the second or first century BC, up to the…

> Most likely: The scheme uses a 205 BC epoch but the object was made later, in the second or first century BC, up to the time of the wreck.

Source: https://mysteriesdept.com/mysteries/antikythera-mechanism/answers/ANS0D3FQCCG615X/the-scheme-uses-a-205-bc-epoch-but-the-object-was-made-later  
Publisher: Mysteries Department  
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[Questions](https://mysteriesdept.com/questions)[Antikythera Mechanism](https://mysteriesdept.com/mysteries/antikythera-mechanism)[When was the mechanism made?](https://mysteriesdept.com/mysteries/antikythera-mechanism/questions/QST0D3FQ5HR1FYH/when-was-the-mechanism-made)Answer

Answer · Antikythera Mechanism

# The scheme uses a 205 BC epoch but the object was made later, in the second or first century BC, up to the…

The scheme uses a 205 BC epoch but the object was made later, in the second or first century BC, up to the time of the wreck.

**Most likely** Answers **1** questionPublished0

## Where it stands

**Most likely** Its tests supported it: two pieces of evidence for, none against. It needs two reviews to be accepted.

## What it predicts

- The epoch choice can be explained by calendar regulation practice rather than by the date of manufacture.
- The wreck date is the lower bound and the lunar theory (Hipparchus, mid second century BC) is consistent.

## What would rule it out

- Physical evidence (alloy, manufacture) ties the object to the late third century BC.

## Evidence 2 for · none against

[Jones argues the design decisions behind both epochs could have been made as late as the shipwreck.](https://mysteriesdept.com/mysteries/antikythera-mechanism/evidence/EVD0D3FQCMA2CA4/jones-argues-the-design-decisions-behind-both-epochs-could)

Supported

FOR

[The pin-and-slot device models Hipparchus's lunar anomaly, which places the design in or after his lifetime.](https://mysteriesdept.com/mysteries/antikythera-mechanism/evidence/EVD0D3FQCW404CT/the-pin-and-slot-device-models-hipparchuss-lunar-anomaly)

Suggestive

FOR

## The questions it answers

[When was the mechanism made?](https://mysteriesdept.com/mysteries/antikythera-mechanism/questions/QST0D3FQ5HR1FYH/when-was-the-mechanism-made)

Most likelyThe astronomical scheme was fixed to an epoch of 205 BC and the device was made then or soon after

## Cite it

```
Mysteries Department. (2026). The scheme uses a 205 BC epoch but the object was made later, in the second or first century BC, up to the… [Answer ANS0D3FQCCG615X]. https://mysteriesdept.com/r/ANS0D3FQCCG615X
```

Key

**ANS** 0D3FQCCG615X

Kind

Answer · hypothesis

Origin

Published

Version

1

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