Here are four CD 121 tolls as follows -- actual postage additional:

CD 121 MCLAUGHLIN // No 16, FDP, olive green blackglass - base chip (see photo) -- $5

CD 121 MCLAUGHLIN // No 16, FDP, olive amber blackglass - VNM -- $15 (SOLD)

CD 121 MCLAUGHLIN // No 16, FDP, great yellow green! - VNM -- $40 (50-75 in price guide)

C! 121 AM TEL & TEL CO, purple, small flat base chip on back -- $30 (SOLD)