I,ve had cabelas corks that had no stamp. Those had wooden heads and were different pattern than llbeans.Also have several llbean impostures that were sold by cabelas. Exact pattern as beans and marketed then as being made by same person or off same patterns. Believe they were produced for a couple years in early 80,s. Side by side identical to beans from same time period. Both cabelas, & beans have stamps bottom cntr. of keel when produced in bean style. Do have an llbean blackduck from same time period with no keel stamp. When cabelas bought out herters they sold some cork bodied birds with herters heads if i remember corectly. Bodies were same pattern as #72,s.