Nope, no way to tell by just looking at the chip itself unless maybe the DSP version is printed on the chip itself under the sticker.. My 1320C has the sticker on the DSP, but there are some physical differences when compared to your card.
1. Most of the capacitors are yellow on my card.
2. There is a resistor jumpering pins 4 and 8 on the IC in the upper right hand corner of your picture.
3. The crystal (XTL1) in the upper left hand corner is a small round one.
4. Almost all the ICs are branded differently then the ones on your card.
So definitely a different run of cards.
I could always pop my card in a machine and check the DSP version real quick, but that would not really mean anything on your end unless the serial numbers were really close which I kinda doubt.
Do you know the serial number of your card? Mine is 174965