Mido Multifort Automatic Bumper Calibre 0917

renerod · 2012-02-07T16:17:16Z

Explore a vintage Mido Multifort Automatic Bumper Sweep Seconds Calibre 0917, its unique free oscillating hairspring, and two-tone dial patina. Discover technical insights and personal stories.

renerod

WPS member · Horological Meandering forum

38 replies5813 views0 photos

Renerod takes readers on a vibrant photographic journey through Mexico City's Central de Abastos, culminating in the reveal of his cherished vintage Mido Multifort. This post beautifully illustrates how watches become intertwined with life's rich experiences, from bustling markets to personal heritage. His detailed look at the Mido's unique movement and dial offers valuable insights for vintage enthusiasts.

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Going trough some dark and dangerous alleys

Some distinctive landmarks of my city

He he! Mexico City's WTC looks like the biggest Single Malt Flask to me... yummy!

I even had a plane to catch...well, in my picture at least

All this to get to this place: Mexico's famous Central de Abastos (Supply Central) where you can get the most fresh and tasty raw material for cooking a delicious food.

Lots of happy faces here!

Be patient please, I'm getting to the horological point

My friend Felipe cleaning something for us...

Well... and what does this have to do with watches and HOME???

Because I was wearing this!

because my companion is nothing more than this old gentleman:

Mido Multifort Automatic Bumper Sweep seconds Calibre 0917, 17 jewels, the only large-scale produced regulator featuring a free oscillating hairspring. The end of the spring is fixed between two rollers, adjusting actually its length. No isochronism error by the gap between the regulator pins. Nice feature, eh? Serial number 1349656 gold cap case, with a little wear at the end of the lugs and a lot of bumps and scratches, otherwise, a nice vintage watch. I have to do more research to find out what year it was made. Acording to some expert at other forum it is between 1949 and 1953.

Well, this old gentleman has a two tone dial, really gorgeous, you'll see, and an adorable (to my eyes at least) big crow that looks like a golden sun.

This message has been edited by renerod on 2012-02-07 16:53:17

Key Points from the Discussion

The Mido Multifort Automatic Bumper Sweep Seconds Calibre 0917 features a unique free oscillating hairspring, where the end of the spring is fixed between two rollers to adjust its length, eliminating isochronism error from regulator pin gaps.
The movement's multi-level design and the integration of the bumper rotor are notable technical aspects, though a bent bumper spring on the author's piece requires repair.
The two-tone dial of the Mido Multifort exhibits a beautiful patina, with its central part appearing darker or brighter depending on illumination, adding to its character.
The Mido Caliber 917 is a 10.5-ligne, 17-jewel movement with a monometallic screw balance and a self-compensating hairspring, featuring automatic winding in one direction via an asymmetrical swinging weight and energy transmission through a ratchet.
A fellow collector shares his own 1964 Mido Multifort, noting its full rotor auto movement also has a freesprung balance, which was challenging for his watchmaker to regulate.
Watches are often cherished not just for their intrinsic beauty but for the positive associations they hold with family, friendship, good times, and life experiences.

The Discussion

KC74

Feb 7, 2012

I hope this a great horological thread :) nice pics btw [nt]

No message body

renerod

Feb 7, 2012

Thank you!

I just wanted to share one of my latest acquisitions with you my horological friends, but it follows

renerod

Feb 7, 2012

Let's take a look at the movement

I like the multi-level design of this movement, the way the bumper rotor integrates with the rest of the mvt and that particular free regulation system, but one of the bumper springs is bent so it has to be changed. If someone has more info about this movement, please share

renerod

Feb 7, 2012

A close up to the crown

Which as I said before, looks like a small sun

Dr No

Feb 8, 2012

Here is what Gisbert Brunner had to say . . .

. . . about the Mido cal 917: 10.5"' 17 jewels monometallic screw balance self-compensating hairspring [as indicated in your description!] automatic winding in one direction of the asymmetrical swinging weight energy transmission via a ratchet I'm guessing it resonates at 2.5 Hz by the number of hash marks; also, the crown looks to be original, as compared to the photo of a circa 1950 specimen printed in Kahlert, Mühe, and Brunner's "Wristwatches - History of a Century's Development". Tonight, d

renerod

Feb 8, 2012

I feel very flattered Art!

To serve as inspiraton for you Thanks for taking your time to share the info about the 917 calibre. That is one of the reasons I love this forum, selfless friendsip Thank you Art. My very best regards to you. René