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Ludwig Drum Guide - Serial Number Based Dating and Authentication Guides for Vintage Drums
Vintage Ludwig Classic 4 Pc Drum Set w/ Cymbals, Hardware - Gold Sparkle - 1965
The Drumslingers: Guide to Identifying a Super-Ludwig 400
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VINTAGE 1958-1961 Ludwig All Original Transition-Pre-Serial Pink Oyste – Badges Drum Shop
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Ludwig 3 Piece Drumset 1960-1963 no serial number keystone badges. | eBay
