Hi Bob. Correct.....on Fiat OEM cams there never seems to be any part #s or identifying marks on the cam itself. Your best hope is that the cam - if new - is still in a sealed Fiat box with the part # on the box.
You know there are MANY different OEM cams for this SOHC series of engines. From pretty mild to pretty wild......
Of course the only sure way of determining the true lift and cam timing of any cam is by measuring it with a dial indicator and a degree wheel.
However.....it has been said... that there is a fairly simple way of doing a quick check.
The "wildest" factory cam is said to be a 1500 euro X1/9 cam. Fiat # 4333059. 24/68 with a 9.9mm lift. You cannot measure easily the base circle and lift of this cam - with calipers or vernier - as the ramp has already started if you try to simply measure across the side flanks. However...due to the high lift...if you simply measure with a vernier from base to nose...it will be about 37.9mm. No other stock OE cam will measure that large. And you have a winner !!!
Similarly.....the next "wildest" OE cam is from an early euro 1300 X1/9 or 128 coupe. Fiat # 4331512. The one you hope you actually got. 24/68 with a 9.75mm lift. ..This will measure about 37.75mm from nose to base. No other stock OE cam will yield that measurement. You are still a winner !!!!
EDIT !!! - after re-reading Steve's replies in the referenced thread - it appears there IS another stock cam that will measure 37.75mm. That would be an early euro 128 coupe 1100 that has a cam ( Fiat part # unknown ) 12/52 with 9.75 lift. Due to the timing, this cam will measure 28.0mm across the flanks. Whilst the 4331512 cam will measure about 28.35mm due to the ramps having already started. So...if you find a 37.75mm cam you would then have to measure across the flanks to determine if you indeed have a 4331512.
Most other stock OE cams will yield that measurement of about 37.2mm or less. And you just got screwed.........
I do not say all this from personal knowledge. I learned it from this thread:
https://xwebforums.com/forum/index.php?threads/euro-1500-cam.23605/#post-194754
Good luck. Got your block back yet ?