Date code For Armstrong Furnace

Does anyone have a Date code chart for Armstrong Furnaces? I have one for the Armstrong A/C but not for the furnaces.
Model: [FONT=‘Times New Roman’]GUJ125D20[/FONT]
[FONT=Arial]Serial: [FONT=‘Times New Roman’]8499F63244[/FONT][/FONT]
[FONT=‘Times New Roman’]****[/FONT]
[FONT=‘Times New Roman’]** Thanks, Ken**[/FONT]](
Newer units – (Serial Number) First two numbers equal manufacturing plant #, 2nd two are** year** and letter in fifth slot is month (A thru M minus I). So 5898 G 07568 would be Plant # 58, Year of MFR would be **1998 **and month would be July.

June 1999.

For some reason it did not upload my info.
Does anyone have a date code chart for Armstrong furnaces?

**Model Number: **[FONT=Symbol]·[/FONT]GUJ125D20
**Serial Number: [FONT=Symbol]·[/FONT]**8499F63244

Thanks, Ken

Hey, Ken.

I’m posting this so you’ll get an email alert to make sure you saw Jae’s post.

Thanks, for the info. For some reason I was unable to read the posts last night. But it is working this morning. You guy’s are the best! Ken