Signedon paper envelope: American Optical / COMPANY
on receipt: THE COOP / OPTICAL DEPT. / ... 11 MAY 65
Inscribedon sticker on lens: 1
in ink on envelope: #1
printed on envelope: BALANCED VISION / TILLYER LENS
printed on envelope: TILLYER / A SCIENTIFICALLY COMPUTED LENS
ProvenancePhysics teaching laboratory, Harvard University