wonderful collection of mostly mint stamps, meticulously identified with a huge assortment of different varieties, we note (just the CZSG-listed varieties): 16.1 (work-up between "Z" and "O" of "Zone"), 16.2 (accent on "A" of "Panama"), 16.4 (one bar at bottom, none at top), 16.6 (two bars at bottom, none at top), 16a.2 ("ZO" of "Zone" widely spaced), 16a.3 ("1 ct." narrowly spaced), 16a.4 ("ct" and "." narrowly spaced), 16a.5 (dot in "Z" of "Zone"), 16a.6 (accent on "A" of "Panama"), 16b.1 ("CA" of "Canal" widely spaced), 16b.2 ("ZO" of "Zone" spaced), 16b.4 ("Canal" 13¼ mm long and "1 ct." properly aligned), 16b.5 ("1 ct." narrowly spaced), 16b.6 ("1 ct." narrowly spaced, "N" inverted in left "Panama"), 16b.7 (work-up after "1" of "1 ct."), 16b.8 (accent on "A" of "Panama"), 16b.9 ("PA" of right "Panama" widely spaced), 16b.10 (third "A" of left "Panama" is inverted "V"), 16b.16 (two bars at top, one at bottom), 16b.17 (two bars at bottom, one at top), 16b.18 (work-up before "1" of "1 ct."), 17.1 (work-up between "Z" and "O" of "Zone"), 17.2 (work-up between "N" and second "A" of "Canal"), 17.3 (work-up before right "Panama"), 17.4 (accents on "A" of "Panama"), 17a.2 ("ZO" of "Zone" widely spaced), 17a.4 (accents on "A" of "Panama"), 17a.5 (first "A" dropped in left "Panama"), 17a.6 ("PA" dropped in right "Panama"), 17a.7 (last "A" raised in right "Panama"), 17a.9 (one bar at top, none at bottom), 17a.10 (two bars at top, none at bottom), 17b.2 ("ZO" of "Zone" widely spaced), 17b.3 ("2 cts." narrowly spaced), 17b.4 ("2 cts." narrowly spaced, "N" inverted in left "Panama"), 17b.6 (accent on "A" of "Panama"), and 17b.14 (dot in "N" and "Z" of "Zone"), many multiples including blocks of four and larger, generally fine to very fine, certainly one of the most detailed collections of the issue to have reached the market in some time, an ideal opportunity for the specialist