Sandbanks Antiques has dated this Sterling Silver Hip Flask to the 1900s.

The base is stamped "ASPREY LONDON" Retail mark
Having vacant cartouche
Manufacturer: Charles & George Asprey (Marked CA.GA)
Origin: London, England
Construction: Heavy-gauge hand-blown glass body with a sterling silver "bayonet" (twist-lock) cap and a detachable silver drinking cup.

The Interior: The drinking cup features its original, remarkably vibrant vermeil (silver-gilt) lining. This gold-wash remains in stunning condition, suggesting the flask has seen very little, if any, actual use.

The Seal: The internal cork remains in perfect, supple condition, maintaining a tight seal—a rarity for a piece of this age.
Hallmarking & Dating
This flask presents a fascinating "transitional" history through its hallmarks:

The Bottle Collar & Cap: Fully hallmarked for London, 1899 (Date letter ‘d’).
The Detachable Cup: Fully hallmarked for London, 1901 (Date letter ‘f’).
This two-year variance is a classic hallmark of luxury bespoke retail, where individual components were often hallmarked as they were completed or pulled from Asprey’s specialist workshop inventory to fulfil an order at the turn of the century.

Condition Report
Good antique condition. The glass is crystal clear with no chips, cracks, slight staining inside glass bottle. The silver is crisp. The bayonet cap locks securely with a satisfying precision. This is a good grade" specimen for a collector of fine barware or Asprey memorabilia. Marks slightly rubbed, slight ding to cup base.
Dimensions
Height: 12.5 cm
Width: 6.5cm
Sandbanks Antiques has dated this Sterling Silver Hip Flask to the 1900s.
Specialising in antique silver, gold boxes, gold coins and objects de vertu. Rare fine-quality imperial chinese porcelain, jades, cloisonné
You can view the stock and full dealer information on the Sandbanks Antiques Profile Page