Yes its not quite watch oil but not as heavy as people think or as aggressive as plus gas used to be.
Just blow off the excess.
But that will leave behind the less volatile stickier components…
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My barometer is on 29 now, up a couple of points since this morning, and the rain stopped a while ago. It is a brass bound one, twinned with a chronometer on a wooden plaque, an inheritance from my Uncle and Grandfather, both Master Mariners.
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@Fleur
Art of Noise did a nice instrumental version of November, I love Hood 
I remember weeping
over the song of the shirt when I was about 7.
Found a link
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Oh Vero! I think it should be compulsory reading for every CEO of a clothing company and every owner of a clothing retailer. All we have done is moved that song to other parts of the world. We should be ashamed of ourselves
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Our weather is changing hourly here, thunderstorms, blue skies, gales, hail stones and now warm and still with blue skies again, after last night’s storms there are more trees down in the Chateau.
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Have gone a whole 4 hours without rain here for the first time in as many days here in SE 47. Strong winds all night with thunder and lightning last night.
Driveway is a small stream as the field above us is now saturated. No dramas as we have a drainage culvert which diverts the flow away from the house and down into the woods.
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We went trekking… all the way up the main street and into the area where our wonderful Bins are sitting… phew… task completed we managed to get home just as the raindrops started again…
But it was a false alarm and we’ve had sunshine with swiftly scudding clouds… like puffs of smoke… almost at roof height… but no more rain… not yet… 
and the Baro has moved over another tiny notch… heading for the bright side… hurrah…
Back home after a totally uneventful trip over to Lac Leman for lunch and back, which since there’s a hill in the way means driving up and over the 1700m col. Weather forecast was dire, low clouds, all day driving rain and gusts of 65km/hr so were really not too enthusiastic.
And yes torrential rain during lunch, but otherwise just fine! Although not much of a view.
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Looking into this Brian, I see many people reporting once the solvents evaporated off indeed there is stickyness of the oil left behind. They are however putting a fair amount say 3-5 ml into a pot and let the solvent evaporate. However thats not really how it would work in practice as the spray would be a tiny amount, probably 1/100th of the amount so leaving a tiny amount of the oil in contact with the surfaces. Indeed I would use on a watch or clock escapement but most mechanisms larger than those would probably be fine but I conceed its thicker than many oils.
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Our engineers were banned from using WD40 on any instruments panels because it gummed things up inside the guages, this was 20 odd years ago so was well known back then.
What type of gauges, a number have a fine hairspring around the spindle so could be understandable
It came directly from the manufacturers weiss instruments, Brannan, Seimens etc.
We enjoyed a brief respite from the gloom when an unexpectedly glorious sunset lit up our western horizon… just as I popped outside to close the shutters…
A mix of blue, white, black, red, gold… with setting sun playing hide and seek… now you see it, now you don’t… then the clouds closed for the last time… and I dashed back inside…
Entombed indoors… we totally missed any chance of seeing this glorious Northern spectacle… 
I’d not seen any alerts… ah well… here are some lovely photos…
Never mind Stella, I’m still waiting to see them, and I was once camping north of the Arctic Circle. 
64 years ago. 
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Inspired by Brian, I opened up the back of the barometer and found that various bits had become detached and damaged. It also looked very much like it had been designed to look impressive on the outside (it was a retirement long service award in the 1940s) but was actually quite cheap and cheerful on the inside. It has now been honourably retired from its own long service. I will discreetly find another one…
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Is there no chance of fitting a modern aneroid inside?
Probably have to be a complete enclosed mechanism with face. I would have thought the inside of an aneroid would be a bit delicate and tricky to try to mend. Probably best and just as cheap to get another second hand, unless the original had some sort of significance to the person. I’m a bit intrigued about how such an old barometer broke so spectacularly in this instance. I Wonder how low the pressure actually got ?
Have to say, I think a photo of the innards would be good @George1
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Youshiko YC9360 Digital Weather Station with Radio Controlled Clock ( Official UK Version ), Indoor Outdoor Temperature Humidity , Sunrise , Sunset , Moonrise , Moonset Times , Barometric Pressure https://amzn.eu/d/jdUxWAi
I’m just wondering if it’s had a physical shock… perhaps during the move… which might have “disturbed/whatevered” one of more of its bits… something which lay quietly waiting for the right moment to “expire”