As far as I can remember, Laserdiscs will operate internationally. It is the
player which converts the disc's contents into a signal appropriate to what the TV expects to see (PAL, SECAM, NTSC, etc).
It's nearly thirty years ago now, but Laserdisc was a near-contemporary of the Compact Disc, and from what I can recall, the Laserdisc might have come along a little earlier than CD. Certainly, Laserdisc players were expensive to begin with, but their prices fell like a stone inside about two years (from c. £500 to about £100), whereas the original Philips CD player held its £500 price for several years after introduction in 1983 and the price only fell when other companies started to compete with Philips and Sony.
Laserdisc (which had competitors on introduction) was simply asking too much of the consumer: it wasn't recordable and software, in the form of the discs, was way too expensive, especially for movies, and there is a limited number of times the customer will watch any one film. As a result, it died a commercial death quite quickly after introduction. VHS videocassette was the undisputed home video champion all the way through to the introduction of the hard-disc recorder, because it offered more of everything: time-shifting, cheapness (especially of blank media), availability of movies via rental and the ability to archive off-air recordings. Rights-holders took a little while to find the correct level for pre-recorded cassettes (I recall seeing a pre-recorded VHS of "The Young Ones" on the shelf at £40+ in the late 1970s), but they got the "established" price down to £10 or less during the 1980s.
It was only the advent of the DVD, coupled with the early growth of the internet (with its possibility of international purchase) which prompted the early introduction of region-coding on the smaller discs in the mid-1990s. Before then, cross-border sales would have been too small to worry about - and Laserdiscs were never cheap, no matter which territory they were released in.
If the OP wants to try his discs, perhaps he's like to consider:
http://www.ebay.co.uk/itm/laser-disc-player-and-terminator-2-laserdisc-/180966837678?pt=UK_Sound_Vision_Other&hash=item2a2276cdae#ht_500wt_1361JN