I have had some very sparse information from web searches. One source says
the firm was in business only from 1948 - 68; another says ceased in the
1980s.
Any further info will be welcome, but it appears any products would fall
into the collectables, rather than antiques bracket.
Jema Holland prices are starting to move significantly - recently a number 328 black panther clock as outlined or showcased at Jema Holland - jema holland.com sold for nearly $300.00 u.s. They are fast becoming somewhat of a treasure after all & the rarer ones, particularly the clocks & lamps can make very good prices.