Adapter Part Number: PA20-16-1PD3
Adapter Description:
PLCC Programming adapter for 20 pin PLCC devices in their 16 pin DIP footprint. Pin skips 1, 6, 11, 16.
Adapter Price: ￥15,500
PDF Datasheet: 2016-1p.pdf

Top Side; Pins: 20 Pitch: 0.050"
Bottom Side; Pins: 16 Pitch: 0.100"