Is this 8 day movement?

[sazabi2001]

I saw quite a few of them on eBay, usually on a bit high end watch / clock. Seems like 1 more wheel compared to normal pocket watch movement. So in wondering if it’s a 5 day or 8 day movement.



Links:

https://www.ebay.co.uk/itm/325234691015 ... media=COPY

https://www.ebay.co.uk/itm/134149020209 ... media=COPY


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[Tanukjaju]

It’s not on my radar… 9x out of 10, an 8 day movements will have “8 Days” printed on the dial…

That said, I’ve been wrong before

[sazabi2001]

It’s not on my radar… 9x out of 10, an 8 day movements will have “8 Days” printed on the dial…

That said, I’ve been wrong before

Yes, typical 8 day movement usually printed ‘8 days’ on the dial. But other typical mechanical sign are one more wheels on main bridge and one more reduction gear on winding section.

I just wondering what that extra wheel does in this movement.


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[TimemiT]

both following movements are smaller than SF240

for reference .... here is an 8-day "Concord"
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Concord 8 Day_a.jpg

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here is a pre-SF240 Angelus 8 day (sitting inside a 44mm case) ... these are mainly seen as Lemania 8 Day and maybe Mathey & Tissot .. few members here have used these movements
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Angelus Proto_d.JPG

[spade_lt]

I saw quite a few of them on eBay, usually on a bit high end watch / clock. Seems like 1 more wheel compared to normal pocket watch movement. So in wondering if it’s a 5 day or 8 day movement.

Way to late, but... no, this is not 8 day movt. It's Tavannes so called "Pleiade" movement (cal. 700?) - additional wheel is used to make the movement thinner, not power reserve longer.