For those who would like to try different peen/pein shapes a good way to get in at a low price is to buy several of the Home Depot hammers (Stanley,I think) that have two flat maul ends,and grind the faces to different profiles on a 36 grit belt.I have one with a left and a right 45 degree angle peen/pein, another with a horizontal and a vertical,and one with a slightly rounded face for spreading metal out.The faces that I grind are not the sharply angled type that you get with blacksmith's hammers. I grind a gentle curve across the face (think of a drawing die on a press) probably about a 1" to 1.5" radius,or about the curvature of the rim of a coffee cup.With these "drawing" hammers,at only 2.5#, it is easy to draw out a billet by hand or to taper out a bowie - without wearing out your arm on a 4# maul.The advantage of the face being at different angles is that you don't have to change your grip and position on the anvil to draw the metal in a certain direction,just change hammers.I hold the blade/billet on the anvil at a 45 degree angle to the edge. My angle peen/pein hammer is ground at the diagonal angle that makes it strike exactly at 90 degrees to the blade/billet.It cuts out a lot of the curving and twisting that can occur when drawing out by hand.
They won't be hand forged Swedish forging hammers,but you can make four of these for the cost of one top grade hammer.
Stacy