Snubber Circuit Suggestion
This is to identify the problems to avoid, in the solution.

Problems:


magnet powered Reed SPDT switch induces contact bounce 23kHz of 0.5ms


reed specs  additional critical specs

load is a reactive power relay coil something like this. from my interpretation
if coil is rated for 60Hz then at 400Hz coil current is reduced by increase in frequency ratio. (Warning )  Suspect L is close to 1H, DCR1~2kOhm 
What the Reed spec doesn't tell you is horizontal time scale spans many decades. See below




To make a reliable Reed switch , never use more than 10% of rated Ipk

Adjust series R to limit current and protect input V with series R and TVS or MOV for 200Vp which is the Breakdown voltage spec of chosen Reed . I suggest 500V reed if you must use a reed.

  

Who would have ever thought an aircraft switch was so complicated?
I prefer a better design than above , but too much info is missing.



Note that I have plotted their data on a LOG-LOG chart and added your operating point with conservatively is 1A but actually 115/100 Ohm =1.15A * 115 = 135VA for a switch rated for 10VA?????