Dear Andrew,

Thank you for contacting Mearto with your appraisal inquiry. My sincere apologies for the delay with the appraisal.

The presented object appears to be an etching on paper with unknown measurements. The print depicts probably Madonna or Magdalena from a crucifixion scene. This print was probably made after the Russian artist Anton Pavlovich LOSSENKO (1737-1773) and the printing plate was engraved by an artist with the name Platovkin. This print was made in the 19th century.

Sadly no additional information for an artist with this name fitting in style and motif is given by reference books and databases. 
Comparable objects were recently offered and sold on the international auction market. 
This piece is in good condition and there is no serious damage visible in the images provided.
A fair market estimation would be between 30 to 60 USD.
This estimate is based on actual recent past recorded auction sales of comparable items. Retail "asking prices" can be higher and may vary.

With kind regards, 

George