Five separate items: 

1.      Small white empty unsealed unaddressed envelope. Bears a large lightly perforated square blue ‘label’, printed in black ‘LYMINGTON POSTAL SERVICE 1/6 7½p The Great Postal Strike’.  The label is tied by a handstruck rubber stamp of a grazing giraffe and a separate rubber date in red ’20 JAN 1971’.  Top left is a three-line handstruck cachet in red FIRST DAY COVER JAN 20 1971 EMERGENCY MAIL. 

2.      Small white envelope as above, but printed top left with a small map in black of the Hampshire coast and Isle of Wight.  There is a printed caption ‘LAST DAY OF ISSUE with short history of Post Office Strike 1971’.  The large red square label is printed in black with the same wording as above, but denominated 3/6 17½p.  Tied by a rubber stamp, in purple, of what may be a raccoon.  The red rubber datestamp is 8 MAR 1971. A minuscule corner of the 'stamp' is off the edge of the cover, but nowhere near as much as suggested by the scan.

3.      Small white envelope as per (2) above, with a large yellow square label denominated 4/6 22½p.  Tied by a rubber stamp, in black, of a rhinoceros. Red rubber datestamp is 8 MAR 1971.

4.      As (3) above, but with a large grey label (with some slight grease marks and faint foxing to a few of the perforations) denominated 5/6 27½p.  Tied by a rubber stamp, in purple, of a monkey nursing its young.  Red rubber datestamp is 8 MAR 1971.

5.      A ‘Short history of the Lymington Private Postal Service’ in the form of a long printed letter dated 9 March 1971, and ‘signed’ by D F Marsh of Lymington.

All five items all in pristine condition (unless stated), subject to the vestige of stamp hinges to the reverse.  The scan shows as much of the fronts of the four covers as I can fit in, together with the top section of the letter.