Ottoman Empire. Abdülmecid I. 20 Kuruş 1255 AH (1839 AD) (No reserve price)

The coin shown in the image is a specimen of the Ottoman Empire valued at 20 kuruş, minted under sultan Abdülmecid I (AH 1255 / 1839 AD) at the Constantinople mint.
The standard silver weight for this specific coin is 24.055 grams.
Below are the main technical features:
Composition: 830/1000 silver.
Gross weight: about 24 grams.
Actual Silver Weight (ASW): 0.6419 troy ounces (equal to about 19.97 grams).
Diameter: 37 mm.
Visual details of the coin
Obverse: It features the Tughra (the imperial monogram of the sultan) surrounded by stars.
Reverse: It contains inscriptions in Arabic indicating the place of minting (Constantinople) and the year of the sultan's accession to the throne, 1255 (AH), visible at the bottom.
The inscriptions are enclosed in a decorative border with stars and crescents.
It is common for the actual weight of circulated specimens to be slightly below the standard due to wear or erosion of the metal over time.
In good condition, signs of wear and of the times