Kosta Swan Vase:

       - Description: This is a mid-century modern glass vase from Kosta, Sweden, featuring an internal design of three swans.        - Origin: Kosta, Sweden

       - Time Period: Mid-20th Century (1950s-1960s)        - Price: I estimate the value of this vase to be between $150 to $300, depending on the specific design, condition, and artist attribution.        - History: Kosta Boda is a well-known Swedish glass manufacturer with a history dating back to 1742. During the mid-20th century, Kosta, and later Kosta Boda, collaborated with several prominent designers to create innovative and artistic glassware. These collaborations helped to define the aesthetic of Scandinavian modernism, characterized by clean lines, functional forms, and an emphasis on natural motifs. 

Designers like Korta Le and Lindstrand contributed significantly to Kosta's reputation for high-quality art glass. Korta and Lindstrand in particular, was known for his innovative techniques and artistic vision, often incorporating nature-inspired themes into his designs. The internal design of the three swans is characteristic of the period, reflecting the era's interest in stylized natural forms and the technical skill required to embed such designs within the glass.