Wischo was the Trade Name of a German firearms dealer by the name of Wilsker & Co. They were located in Erlangen Germany. The .25 automatic your inquiring about was probably made by one of the many German handgun makers who were in business in the 60's & 70's. Impossible to determine without detailed information, but values on these are generally not very high, in the range of $50-$100, depending on condition.
50-400
100 or so
No such weapon
0-70 USD or so
20-80 USD or so
10-100 USD maybe
Depending on EXACTLY what it is, 25-2500 USD or more.
100-435 USD
25-125 usd
The value of a Colt Match Target automatic .22 cal long rifle left hand grip will depend on the condition. There are some valued at $ $1,999.00 in excellent condition.
10-1000 USD or more depending on specifics.
25-100 USD without more of a description