From the bottom of a small Samian B bowl with part of the foot preserved.
The stamp:
Red glaze inside and out. Leica, 93-30-15 PD 1171-181, PD 1172-6 ... 26 April 1934
Well (Hole) at 19/Ι(ΙΑ). Collapsed well creating a hole above; mixed fill in hole, early Byzantine in well proper. Coins:
26 April 1934 #12
27 April 1934 #28
28 April 1934 #38
1 May 1934 #3 ... Early Byz.