Type D vs. Type L

Type D is the old British 5A standard (BS 546, 1934) -- three large round pins in a triangle. It predates and is completely incompatible with the UK's later Type G, and remains the primary domestic standard in India, Nepal, and Sri Lanka today.

Type L, Italy's standard, uses three round pins in a straight line rather than a triangle, in two incompatible sizes (10A and 16A). Chile and Uruguay use the same physical design, though no independently confirmed national standard document defines it in either country.