To identify Czech studio glass, focus on color combinations, form, and manufacturing techniques like pressing or cutting. Look for distinctive features like "birdbath" bases on pressed glass and be aware that signatures are rare on postwar pieces. Understanding the history and evolution of Czech glass, including the differences between pressed and blown glass, and the characteristics of different periods (e.g., the fluid curves of the 1950s, the abstract designs of the 1960s) can also be helpful. 

Specific identification tips:

1. Color: Amber-brown and green combinations are common in Czech glass. 
2. Form: 1950s pieces often feature fluid curves, while 1960s pieces tend towards abstract designs. 
3. Markings: Czech glass is rarely signed, especially postwar pieces. Pressed glass may have mold lines (vertical lines from the mold) or a "birdbath" base (smooth, concave center with a machine-cut rim). 
4. Weight and Refraction: Crystal, which has a higher lead content than glass, will be noticeably heavier and exhibit greater light refraction (look for "multiple rainbows" when held up to light). 
5. Mould lines: Pressed glass will often have mould lines. 
6. Skrdlovice and Sklo Union: These are key names in Czech studio glass. Škrdlovice employed many designers and produced limited runs. Sklo Union focused on pressed glass. 

General tips:

• Consult specialist books and resources: This will help you familiarize yourself with different designs and styles.
• Handle and examine pieces: Get a feel for the weight, texture, and quality of genuine Czech glass.
• Attend antique fairs and auctions: This is a great way to see a variety of pieces and learn from experts.
• Be aware of misattributions: Don't be afraid to question attributions and do your own research.