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Old 05-12-2012, 07:11 AM   #1
MIOB OP
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What tacho did I buy?

I went to a swap meet today. I'm hoping to start a new project bike soon and swap meets are always fun anyway.

I bought a speedo. It says 'British made' at the front and this code at the back: 7y 17255 a4 1577008

It's quite large (see the euro-coin for scale).

Even if I can't use it, it will look great at my desk, but I am still interested in what bike it came from. It's a bit of a long shot, but maybe someone here knows?










MIOB screwed with this post 05-12-2012 at 09:58 AM
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Old 05-12-2012, 07:57 AM   #2
caponerd
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errmm....

That's a speedometer.

The "font" used for the numbering resembles what Smith's used, but the 7 has a slash through it which suggests that it was made for a European vehicle. The mounting tabs suggest that it wasn't made for a motorcycle, but that's certainly not going to rule it out entirely.

I don't know if the Smith's Chronometric instruments were ever made with a crimped-on bezel, the ones I have (two speedos and a tach) all used a plated brass, screw-on bezel. Other than that, it looks a lot like some version of Chronometric speedometer.

If you could open it up without chewing up the bezel too badly, it would have a very complicated looking clockwork mechanism inside, which operates on a kind of "ratchet" principle. Very clever people, these Englishmen.
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Old 05-12-2012, 09:53 AM   #3
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Quote:
Originally Posted by caponerd View Post
errmm....

That's a speedometer.
I was going to say I can't think of anything british that revs up to 14k... nor have I seen an odometer on a tach.
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Old 05-12-2012, 09:58 AM   #4
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Sorry, speedo of course! It has been a long week :)
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Old 05-12-2012, 10:02 AM   #5
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You sure it's from a bike? Looks to me that it has mounts for attaching to the back side of a dashboard.
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Old 05-12-2012, 10:04 AM   #6
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You sure it's from a bike? Looks to me that it has mounts for attaching to the back side of a dashboard.

No I'm not. But the bracket on the right side of the speedo seems to suggest 'bike' to me, in a dashboard, there would not be a reason I can think off for that bracket.


I am hoping to use it on a scrambler project in the future.
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Old 05-12-2012, 08:09 PM   #7
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Next question is, what units are they.... miles or kilometers?

Looks cool anyways.
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Old 05-12-2012, 09:14 PM   #8
caponerd
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Originally Posted by anonny View Post
Next question is, what units are they.... miles or kilometers?

Looks cool anyways.
Undoubtedly KPH.

That seven with the slash through it says that it was made for the European market, hence kilometers. Besides, when that thing was made (probably late 50's-early 60's, there weren't many vehicles that had any need at all for a speedometer capable of reading 140 mph.
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Old 05-13-2012, 01:42 AM   #9
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A lot of speedo's from 60's and down were designed to bolt in to the dash board panel from behind, hence the little tabs on either side of the unit. If you look at the bezel (front chrome ring) it is stepped, to fit into a recess.

This is a cool game! Guess the car!

I'll have a go........
Plain looking numbers with Euro #7 - German, Czech, French?
140kph speedo, probably 120kph max speed vehicle - 4cyl from the 50's.
Thin stepped bezel - no timber dash, probably steel, so economy model.
No manufacturer stamp on faceplate - not Merc, BMW, Citroen, Peugoet.

Possible early 50's Audi?

(HAHA! I'm so full of crap sometimes!)
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Old 05-13-2012, 02:58 AM   #10
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Car or bike speedo, I think it looks great on my Beemer:








A 2 minute job, it is not intended to go on the beemer (and it wouldn't work).

I'll save the speedo for later, thanks for the input!
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Old 05-13-2012, 07:58 AM   #11
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You wasted no time fitting that on.
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Old 05-13-2012, 08:16 PM   #12
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Dam!

I think it's worth making it work... sorta like the old Vincent speedos....very retro, very cool!

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