Mike - I would say you have tantalum solid electrolyte capacitors. 152D "Tantalex" type made by Sprague (now Vishay). These come in four case sizes (A, B, R, S,). With the following dimensions:
A - diameter 0.135, length 0.286
B - diameter 0.185, length 0.474
R - diameter 0.289, length 0.686
S - diameter 0.351, length 0.786
Dimensions are in inches and length is for case only (don't measure leads). Should be abel to measure to verify, hope this helps.
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