Array in awk outputs multiple values

Shell Programming and Scripting
1

Disclaimer: OP is 100% Awk beginner.

I use this code on ASCII files I need to report against.

   awk 'BEGIN {
       tokens["Model"] = 0
       tokens["Manufacturer"] = 0
       tokens["Mfr Date"] = 0
  }  
{   for (token in tokens)
{ if ($1 == token){print $0; tokens[$1]++;}}}
END {for (token in tokens){
if( tokens[token] == 0){printf("%-13s = NA\n" , token)}}}' FILENAME

Most of my files output like this

Model = XYZ
Manufacturer = ABC
Mfr Date = 1/1/2008

When one or more array elements are missing, output like this for instance

Model = XYZ
Manufacturer = NA
Mfr Date = NA

I have problem with the "Model" key with occasionally outputs similar entries like so

Model = XYZ
Model Number = 123456
HW Model = AAABBBCCC
Manufacturer = NA
Mfr Date = NA

Is there a way in Awk to specify the token "Model" exclusively so that anything else is ignored? I tried "$Model^" as a key but to no avail.

TIA.

2

Maybe try setting FS to ' = '