Hi Marcus, 
 
 
Congratulations on acquiring that nice wrought-iron detachable breech that has been preserved in perfectly uncleaned original condition. Please do keep it as it is. 
 
Wrought-iron breech-loading pieces of cannon with interchangeable chambers/breeches have been made since at least the mid-15th c., thus continuing being kept in use for about 100 years, almost without any significant formal or stylistic development that would be noticeable and allow a closer dating.  
From the later part of their working life, we have records thru the samples found in the wreck of the Mary Rose that sunk in 1545. 
 
 
Best, 
Michael
		 
		
		
		
		
		
		
		
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