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					Originally Posted by chregu
					
				 
				hi Jim 
Thanks for your help. what do you think about the 50s would have to agree? 
many greetings Chregu 
			
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Thank you Chregu for the response, and absolutely my pleasure. I am grateful for your posting this, there really is not a great deal on them in most literature but they are certainly of use into modern times. I agree with Martin's time assessment, probably in the 60s but a genuinely used piece. 
All the very best,
Jim