Datassette Unit (Datasette) 1530 / C2N (VIC1530, VC-1530)

From Wikipedia:

There are at least four main models of the 1530/C2N Datassette:

• The original modified Sanyo M1540A cassette drive, built-in the earliest models of PET in 1977. This was a standard shoebox tape recorder with a corner of the case removed and modified electronics; a Commodore PCB was installed internally in place of the Sanyo electronics. To disguise the Sanyo brand, Commodore simply fitted a Commodore badge over the original logo.
• The second built-in Datassette in the PET 2001: another standard consumer model (Sold in some markets as CCE CCT1020) modified with a Commodore PCB. Black cassette lid, five white keys, no tape counter, no SAVE LED
• Black body original shape model, black cassette lid, five black keys, no tape counter, no SAVE LED
• White body original shape model, black cassette lid, five black keys, with tape counter, no SAVE LED
• White body new shape model, silver cassette lid, six black keys, with tape counter and a red SAVE LED

The first two external models were made as PET peripherals, and styled after the PET 2001 built-in tape drive. The latter two were styled and marketed for the VIC-20 and C64. All 1530s were compatible with all those computers, as well as the C128.

The model was also named VIC1530 or VC-1530 in some markets. Early versions were called Datasette (with one "s"). Special tape compact cassettes were available with less storage than regular CCs.

Model 1531 is identical except for the data / power supply connector used.

Here you find 3 models, 2 with images and 1 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Commodore International Ltd. (CBM); West Chester, PA