Pe-8? Somewhere between 80 & 93 built, including a number with diesel engines (IIRC a unique feature among WW II bombers) by May 1945 roughly 30 remained active, mainly in the transport role (by comparison the USAAF accepted some 12,000 B-17s,18,000 B-24s, 3,900 B-29s, & even 118 B-32s, an...