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			Alastair, some are felt, some are cork, and they are the early ones. The later design used a std leather lipped seal wilth a cork ring in the side plate.I'll send you an email.
 
				__________________Bluebell
 
 Carrier Armoured O.P. No1 Mk3 W.  T84991
 Carrier Bren No2.Mk.I. NewZealand Railways. NZR.6.
 Dodge WC55. 37mm Gun Motor Carriage M6
 Jeep Mb #135668
 So many questions....
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