Country of Manufacture:Austria
Speeds: 1 7/8, 3 3/4
Max Reel Size("): 7"
Number of heads: 2
Head Composition: Permalloy
Head Configuration: Mono - Full Track
Frequency Response:50 - 13,000 Hz at 3¾ ips & 50 - 8,000 Hz at 1 ips
Wow and Flutter:better 1.5% at 3¾
Signal-to-Noise Ratio:Signal-to-noise ratio: better than -45dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Hornyphon Diola-Automatic-Super WM9121A was a quarter-track mono recorder with hybrid circuitry( ECL82 and EM87 tubes plus seven semiconductors).
It featured two-speeds, a 7″ spool capacity, 2.5 watt output, internal speaker and automatic (with manual over-ride) recording level.
Like all Hornyphon recorders it was based on a Philips machine (not sure which one) and built under license by Hornyphon for the Austrian market.
Price when new (in Austria) was