mostly pre 2000 proton cars are equipped with siemens. to differentiate whether siemens ecu or mitsu ecu, siemens ecu if i'm not mistaken there is a blue socket on top of the distributor while engine comes with mitsu ecu doesnt have any.
mitsu ecu are more tuneability (flexible) while siemens ecu e.g used on satria R3 is very much fixed and locked.
if i'm not mistaken the code of putra's ecu is 2468 or 5537