This appears to be a vintage Fero Feldmann mechanical wristwatch, likely from the late 1960s to early 1970s. A few notable details: • The dial reads “FERO Feldmann” and “17 Jewels”, indicating a jeweled mechanical movement. • The red/blue rotating bezel and bold geometric dial styling are very characteristic of the 1970s “compressor/diver-inspired” aesthetic. • The inner 24-hour scale and dual crowns suggest it may have had an internal timing or world-time style function. • The “ATM” marking near the bottom likely refers to its water resistance rating when new. • “T Swiss Made T” indicates the watch used tritium lume, common in Swiss watches of that era. Condition observations from the image: • The case shows noticeable wear and scratching. • The bezel insert appears aged but still attractive. • The dial looks relatively well preserved, which is important for collectors.