Antique Hebdomus 8-day pocket watch with silver case, in good working order

We would like to introduce an antique pocket watch from the Swiss company Hebdomus.

This is a typical Hebdomad 8-day pocket watch that is thought to date from the early 20th century.
Also known as a flower clock, it features an enamel dial decorated with flowers and a visible balance wheel.
The silver case, made of 800 silver, has a chamfered bezel and an antique-style cartouche decoration on the back cover.
The spring seems to be weakly fixed, so when you wind it it will eventually rewind, but in actual measurements it will still run for more than 7 days.
It is unknown if it has been overhauled, but the balance wheel is in good condition and ticks along smoothly.

We hope this once-in-a-lifetime encounter will be a special one for you!

(Explanatory video)
I will add it later

【condition】
Appearance: ★★★★☆ Excellent condition with no noticeable scratches or stains

Function: ★★★★☆ Maintenance history unknown but in good working order

- Case: There is some wear and tear over time and some small scratches, but it has been well maintained and is in beautiful condition.
Case engraving: Swiss and German 800 silver hallmarks on the inside of the case back
・Dial: In beautiful condition with no cracks or chips
Accuracy: Within 1 minute per day when measured with a timegrapher placed flat (when fully spring loaded)
Power reserve: 7 days or more from full mainspring. When trying to wind the mainspring to the end, it will rewind a little.

*The daily difference may vary depending on your posture, so please use this as a reference only.
*It is very old, so I don't know the history of parts replacement or repairs.

【detail】
・Brand: Hebdomas
- Year of manufacture: Early 20th century
Movement: Mechanical
・Mainspring: Manual winding
・Time setting dowel press (nail set)
・Serial No. 441035
Case material: Continental silver (800/1000)
・Case diameter 48.5mm (excluding crown)
・Case thickness 15mm (including crystal)
・Weight 80g

*This is an antique item and there is no other item that is exactly the same.
If you have any questions, please feel free to ask.