FRANCE (1971) Grignard*. Nobel prize medal*. Lab equipment*. Deluxe sheet. Scott No B447, Yvert No 1669.
AVAILABLE AT $15
MALI (1983) Lavoisier*. Laboratory apparatus*. Formula for water*. Deluxe sheet commemorating Bicentenary of Lavoisier's Water Analysis. Scott No 476, Yvert No 475. Hard to find!
AVAILABLE AT $30
UPPER VOLTA (1970) Lab equipment*. Deluxe sheet, Chemical Industry - Hanover Fair. Scott No 223, Yvert No 221. Attractive!
AVAILABLE AT $20
SENEGAL (1974) Lab equipment*. Deluxe sheet, Dakar International Fair. Scott No 405, Yvert No 406. Hard to find!
AVAILABLE AT $15
FRANCE (1957) Thenard*. Crystals*. Deluxe sheet. Scott No 864, Yvert No 1139.
AVAILABLE AT $35