Portrait of a Man - British School

Small format oil on wood portrait of a man, likely produced in the 19th century, in the manner of the 17th century. Possibly a sketch for a larger work. It has a quality of a self-portrait. The artist remains unidentified. The paper backing has been removed to reveal a gallery label that reads: “Frederick Eastwood, 5 & 7 Fenchurch Street”, we assume in London. 

Artist: Unknown (unsigned)
Medium: Oil on wood.
Condition: Very good condition.
Dimensions: 19.5 x 14.5 cm. / 7 ¾ x 5 ¾ in.
Frame: 33 x 28.5 cm. / 13 x 11 ¼ in.
Origin: United Kingdom.