==Type A (Rygh 557 / Wheeler I)==
{{Type|
|ghi1h=60px
|i1=Axe type A.jpg
|i2=R557.jpg{{!}}R557
==Wheeler II==
{{Type|
|ghi1h=60px
|i1=Axe Wheeler II.jpg{{!}}Wheeler II
}}
==Type B (Rygh 559 / Wheeler III)==
{{Type|
|ghi1h=60px
|i1=Axe type B.jpg
|i2=R559.jpg{{!}}R557