AKG D25 1960's Cardioid dynamic microphone
This is a superb sounding microphone in good condition. It was designed in the 1960s to record bass drums, double bass etc however it is also good on most sound sources and particularly good on vocals.
The D25 was the predecessor to the D12 which preceded the D112 - it always surprises me that manufacturers of audio equipment introduce new models which are not as good as the models they are replacing. WHY ! dbx did it replacing the superior 160 with the 160X.
There is one anomaly however - all the other D25's that I have seen ( I have not seen many as they are quite rare ) have been fitted with a bass roll off switch, this one is not and it does not appear to ever had one.
If I still had a studio this would be my first 'go to' vocal mic before trying a large capsule condenser microphone particularly if the singer had a sibilant voice.