ASSU Illustration 3476 Woodblock for printing an illustration of a hand putting a letter in a slot. Letters. Postal service. Hand. Recycled products. Block numbered in one place: 3476, also 620 on small adhesive label on back of block. Image of a hand inserting a rectangular envelope into a slot with a sign that says “Letter Box”; the part of the block where the letter should be is cut out of the block completely from front to back, suggesting that there may be multiple replaceable blocks that fit into this block for different uses. American Sunday-School Union, former owner. [s.a.] Wood blocks (Printing blocks) Wood engraving (Process) End-grain blocks. 1 wood block ; 5.5 x 6.0 x 2.3 cm. digitool:125260 ASSU Woodblocks -- Box 20