Mike,
Back in the day...(Good reference point meaning I don't know exactly but some time back) Squared-top single hilts were the norm. Not-so-much anymore. Photos below.
Hope this helps,
Capt. Chris


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_________________________
Capt.Chris Stanaback
RKCC/RKCA Founder
RKS #016
NRA Lifetime Member
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WEBSITE: www.captstanaback.com