Name: Level-Vu Prism more
Manufacturer: Computer Add-ons
Price: £3.99
Blurb: See your tape counter without having to lean forward ! Magnifies your counter.
Source: Sinclair User Aug 83

Name: Lifetime Disc Drive more
Manufacturer: Miles Gordon Technology
Price: £129.95

Name: Light Pen Interface more
Manufacturer: Tenkolek
Price: L. 44.900

Name: LMT 68FX2 Keyboard more
Manufacturer: LMT Computers Ltd
Price: £39.95
Blurb: 68 full travel keyboard with numeric pad.
Source: Your Sinclair Feb 86

Name: LMT SPD1 more
Manufacturer: LMT Computers Ltd
Price: £89.95
Blurb: Disk and printer interface. Includes snapshot button.
Source: Your Sinclair Feb 86

Name: Loadmaster more
Manufacturer: Probemaster Ltd
Price: £11.49
Blurb: LED meter for signal strength. Fits between the cassette and the Spectrum.
Source: Your Spectrum issue 11

Name: Logitek Disc Interface more
Manufacturer: Logitek
Blurb: This interface allows you to connect a 1541 disc drive to your Spectrum

Name: Logitek Floppy/Printer Interface more
Manufacturer: Logitek
Price: 298 DM (£107 apprx)
Blurb: Interface with built-in centronics port that also allows you to connect the Commodore 1541 floppy drive to your Speccy.
Also contains routines to support a 48K ramdisk on a 128K Spectrum.
Source: Magazine c't 1985 (supplied by Peter Sieg)

Name: Logotron Sprite Board more
Manufacturer: Logotron Ltd
Price: £129.95
Blurb: Hardware based sprite/graphics board. Program sprites size, shape, colour and speed, and the the board does the rest.
Source: Sinclair User Jan 85
Note: Was this ever released ? The adverts says 'coming soon'

Name: Lo Profile Professional Keyboard more
Manufacturer: Advanced Memory Systems Ltd
Price: £49.95
Blurb: 53 full travel keys in a lo-profile case. Numeric key pad.
Source: Your Spectrum issue 8