Help identifying specific EF 28-70mm lens

[Zipper666]

has Canon 28-70 f2.8 zoom NOT marked "ultrasonic" is this an earlier model?

All seen online are so marked

[jrhoffman75]

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@Zipper666 wrote:

has Canon 28-70 f2.8 zoom NOT marked "ultrasonic" is this an earlier model?

All seen online are so marked

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Can you post a photo of your lens?

[Zipper666]

excuse quality of image. UB0600 0n rear and 112040 on bottom edge

[jrhoffman75]

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@Zipper666 wrote:

excuse quality of image. UB0600 0n rear and 112040 on bottom edge

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I don't think that’s the f/2.8L version. No red ring  Looks like the f/3.5 lens. 

[Stephen]

The UC600 means it was made in June 1987 at our Utsunomiya, Japan factory. 
Based on that, I'm confident that the lens is the EF28-70mm f/3.5-4.5.

[deebatman316]

Yes Stephen I have an old EF 70-210mm F/4 lens. It was also made in Japan too. I believe all of these early EOS system lenses were made there.

[Stephen]

We still make our lenses in Japan. I should have been more specific, so I'm revising the post!

[deebatman316]

I was specifically talking about the AF motor type. All Arc Form Drive lenses came from that factory and nowhere else. Even as recently as 2022. 

[deebatman316]

That's an older Arc Form Drive AF motor lens. The reason you can tell is because the date code starts with a "U". Only Arc Form Drive AF motor lenses were made there and nowhere else.

[Zipper666]

Thanks to everybody for those useful responses!