Very hard to find and very expensive to buy - these are new display ic's that we had for a development project that never went ahead.
Intelligent Alphanumeric Display
Siemens SLG 2016
14 pin DIL package
4 digit configured as 5 x 7 dot
Contains memory, multiplexing and drivers
Asynchronous data input
I have the full data specification sheets which include character truth table, suggested clock circuits and practical information to get the device up and running.
These are normally very expensive, one off trade price is around $45 - $50 each