Mark 4-A Mark 4-B
Dimensions: At least 292 x [370]
Chainlines, Mark A:Top: [ | 19 | 19 ( 20 ) 19 | 18 | 19 | 18 | 19 | 19 | 18 | 19 | 19 | 18 | 19 | 19 | 19 | 18 | 20 | ] Bot: [ | xx | 19 ( 19 ) 20 | 18 | 19 | 19 | 19 | 18 | 19 | 18 | 19 | 19 | 20 | 17 | 19 | 20 | 18 | ]Chainlines, Mark B:
Top: [ | 20 | 18 | 19 ( 19 ) 19 | 18 | 19 | 18 | \\ | 20 | 18 | 18 | 19 | 19 | 19 | 17 | 18 | ]
Bot: [ | 19 | 19 | 18 ( 20 ) 18 | 19 | 19 | 19 | \\ | 19 | 19 | 17 | 20 | 19 | 19 | 18 | 18 | ]
Wirelines, Mark A: 33 / 3cm
Wirelines, Mark B: / 3cm