The process of discerning the specific design and maker of glassware produced by Libbey and Rock Sharpe is a nuanced endeavor. This practice involves careful examination of etched or cut motifs, glass shape, and manufacturer’s marks. For instance, identifying a “Grapevine” pattern on a cocktail glass attributed to Rock Sharpe allows collectors and researchers to accurately catalogue and value the piece.
Accurate determination of glassware design and manufacturer is paramount for historical preservation, valuation, and authentication. Identifying specific designs links pieces to particular time periods and production methods, providing valuable insight into the history of glassmaking. Furthermore, precise identification is essential for collectors seeking to complete sets or understand the rarity of specific items; and for insurance purposes, for accurate valuation of items.