SANDRART Jacob von (1630 - 1708) - Allegorical portrait of Ferdinand III, German Emperor. 1653. RARE etching and burin engraving. Proof with the letter, on fine watermarked laid paper. Small margins for three sides. Beautiful impression. 50,5 x 35,7 cm. Condition B (cut inside the copperplate mark at the top, a few short tears and stains on the edges of the sheet, trace of old wetness at the bottom right and some traces of old folds).