Article below indicates that 2000 Lovell Diamonds were made in 1890. Lovell made arrangements to make 6000 in 1891.
From February 20, 1891 issue of
the Wheel:
Lovell Diamond Serial Number 4695 stolen April 28, 1892 from May 27, 1892 issue of
The Wheel:
Lovell Diamond Serial Number 4730 stolen July 11, 1891 from July 14, 1891 issue of
The Boston Globe:
1892 Lovell Diamond with head tube redesign from March 18, 1892 issue
The Wheel: