* Delete 2 Part 4085a White Plate, Modified 1 x 1 with Clip Vertical - Type 1 (thin open O clip)
* Add 2 Part 4085b White Plate, Modified 1 x 1 with Clip Vertical - Type 2 (thin U clip)
* Delete 2 Part 4085a White Plate, Modified 1 x 1 with Clip Vertical - Type 1 (thin open O clip)
* Add 2 Part 4085b White Plate, Modified 1 x 1 with Clip Vertical - Type 2 (thin U clip)
I own this set until 1986 and his parts has never been mixed with other sets,
maybe this change can be listed as alternate item