^Lot 1589 Brass and ivory pocket sundial featured in the December 1977 issue of National Geographic magazine,

Brass and ivory pocket sundial featured in the December 1977 issue of National Geographic magazine, ex-HMS Winchester (1695). 10 grams, 2" x 1-1/4". Small brass dial mounted in the center of an engraved rectangular section of dark red ivory, with small knob at bottom, one corner repaired and tiny hole in another corner for carrying on a thread, a small but significant object with an important pedigree. XRF results: 66.78% copper, 22.55% zinc, 8.28% iron, 1.27% silver (plus some trace elements). With Bob "Frogfoot" Weller photo-certificate (hand signed, erroneously stating the metal as gold), plus a CD and color photocopy of the National Geographic magazine in which it was featured.