1854 Cover to (London-) Derry with 1854 1d red SC perf. 16

1854 Cover to (London-) Derry franked with 1854 1d red SC perf. 16, tied by long "split" Irish numeral Diamond "62" of Belfast, and with fine italic Arthur Street (R.H.) / Belfast in blue, backstamped Belfast small double-ring cds in black and, most unusually, DERRY in deep purple.