Here's what I got on my end after LZH'ing this file (for the record)...
 
 
LHarc 2.01g (c)Yoshi, Quester, 1988-91.(Assemblerversion vom 07.10.1991)


Listing of archive : 'D:\ARC\USA.LZH'

  Name          Original    Packed  Ratio     Date   Time   Attr Type  CRC
--------------  --------  -------- ------ -------- -------- ---- ----- ----
  LZHCHECK.TXT       710       379  53.2% 93-01-18 20:59:48 a--w -lh5- 96BA
  README.TXT         492       321  65.2% 93-01-18 20:45:46 a--w -lh5- 71E3
  US_1.IMG        100756     12367  12.3% 93-01-18 20:31:46 a--w -lh5- 4EF5
--------------  --------  -------- ------ -------- --------
     3 files      101958     13066  12.8% 93-01-18 21:00:46