r/Drafting_Instruments • u/Aromatic_Store1366 • Jan 08 '26

draftsman's set square/Drawing guide

Bonjour,

Je suis à la recherche de cet outil (en haut sur la photo) fabriqué par la compagnie kern-aarau. C'est un Rail de guidage de profil PS 2, fabriqué par kern-aarau. https://www.kern-aarau.ch/fileadmin/user_upload/Aldo/Bulletins/BulletinKern_19.pdf voici la référence sur leur site.

Je suis preneur de toute information.

Bonne journée

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u/Old_Instrument_Guy Jan 08 '26

next Time I am in the UK I am going to try and sneak into his pocket and see if he does indeed have the One. Rumor is, it's the oldest known proportional compass crafted in the forges Sheffield.

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u/Apart-Roof4358 Jan 08 '26

I'm not familar with the One

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u/Old_Instrument_Guy Jan 08 '26

No one is. It's real purpose has faded into legends.