These Lead coins were originally part of William Spengler collection and were published in the Oriental Numismatic Society Newsletter ONSNL Issue 57, Dec. 1978.
All show a Garuda on the Obverse, some with a Chakra (wheel) on the side of Garuda Bird.
Reverse: Shri Skanda Gupta sya. Conch (shanka) shell above on some coins.