Marcus Agrippa, lieutenant of Augustus (died 12 BC). AE as (27mm, 6h). Posthumous issue, Rome, AD 37-41. M•AGRIPPA•L•F•COS•III•, head of Agrippa left, wearing rostral crown / Neptune standing facing, head left, nude but for chlamys hanging behind and over both arms, small dolphin left in outstretched right hand, grounded trident in left; S-C across fields. RIC I (Caligula) 58.
@paschka , respectfully, do you even attempt to do your own identification? A coin like this ought to be extremely easy to identify on your own using the most basic searches. You can use OCRE (Online Coins of the Roman Empire) for Roman Imperial coinage, and archive sites like ACSearch or CNG's archives for coins of all types. I started as a totally ignorant beginner a few years ago, but even I can navigate the above websites competently enough to handle 99% of my identification questions. I am glad to help identify a mystery coin when I can, but if you can't be bothered to extend the slightest effort on your own behalf, my interest in helping quickly evaporates. I have to wonder why you even collect these coins if you are so uninterested in finding out anything about them.
You are right, of course, I was able to identify this coin myself, but perhaps you, as a more experienced numismatist, can find some secret features in this coin that I could not find.
The three varieties listed of RIC 58 all have prominent countermarks, none of which are present on your coin. I have no idea what a secret feature is.
I'm not sure what you mean by "secret features", but if you think you're missing them because of your inexperience, good news! There's a fun and easy fix - put some of your own time into learning and researching instead of constantly asking and expecting others to do it for you. We all start from scratch at some point. Again I don't want to sound harsh and I am always happy to help identify a mystery coin or answer questions if I can, but if it's not important enough to you to invest your own time why should I donate mine?
