this post was submitted on 10 Aug 2024
78 points (98.8% liked)

What is this thing?

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Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.

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[–] [email protected] 26 points 3 months ago (1 children)

At the beginning of the first world war they plotted all military operations using these giant pins. Later in the conflict ‘map pins’ were developed and these ‘land pins’ became obsolete. Another fascinating example of how the horrors of war pushed technology forwards in civilian applications.

[–] [email protected] 22 points 3 months ago

Imho joke answers should be against the rules of the sub.

[–] [email protected] 23 points 3 months ago (2 children)

Looks like piece of a wheel and an axle from a tractor or a truck or something.

[–] [email protected] 25 points 3 months ago (2 children)

It’s in the centre of France so it’s actually the France axle.

[–] [email protected] 9 points 3 months ago (1 children)

Please don't touch it or you'll make France all wobbly

[–] [email protected] 3 points 3 months ago

The IWW would like you to touch it

[–] [email protected] 6 points 3 months ago (1 children)

…otherwise it’d just be sparkling wheel shaft.

[–] [email protected] 6 points 3 months ago

sparking shaft

I should call him ...

[–] [email protected] 7 points 3 months ago
[–] [email protected] 9 points 3 months ago (1 children)

Marking the exact center of France

[–] [email protected] 6 points 3 months ago* (last edited 3 months ago)

i remember seeing somewhere in paris the prime pin

must be around Notre Dame

edit: yes, it indeed is there : point zéro

Point Zéro des Routes de France (1)

[–] [email protected] 7 points 3 months ago (1 children)

It looks very rough, it could be an unfinished part: a fusion that hasn't received the subsequent machining.
Maybe a flywheel.

[–] [email protected] 5 points 3 months ago (1 children)

I think that's just from many years of rust and wear. I doubt that's the original surface finish

[–] [email protected] 1 points 3 months ago

Could be both

[–] [email protected] 4 points 3 months ago (1 children)

A large ship engine valve? Maybe an unfinished casting? Finished ones here

[–] [email protected] 4 points 3 months ago (1 children)

If that's a valve, the cylinder is probably big enough to climb inside!

[–] [email protected] 2 points 3 months ago

I think it might be a riser or part of a sprue from a larger cast part

[–] [email protected] 3 points 3 months ago

I wouldn't have known it was metal just from the picture. It looks like a stone bird bath.

[–] [email protected] 2 points 3 months ago

What does the top look like?

[–] [email protected] 1 points 3 months ago

It is flat (and round obviously).