How to find What year your old pfaff machines was made

Hello, Annie -

I have not yet found much on the Pfaff 434-0-6/1B sewing machine. Based on snippets of information I have found it MAY be an industrial sewing machine.

You may learn more by asking your question on an online sewing discussion forum. One I have found is PatternReview.com. This is the link to the home page:
https://sewing.patternreview.com/

There is a Pfaff Pfans forum on PatternReview.com:
https://sewing.patternreview.com/SewingDiscussions/topic/80724

You will need to be registered (free) and logged in on PatternReview.com to ask any questions.

Best wishes.

You probably need the serial number:

Pfaff Questions Answered When was my Pfaff Sewing Machine Made

PfaFF sewing machine squeak Questions & Answers - Fixya

www.fixya.com > Forum > Tags > sewing machine squeak
I need a new mother board for Pfaff creative 1475 ... sewing machine by ... I am unable to disengage the sewing action on my Pfaff 1473CD to wind the bobbin.

hi There.
this is all i could find from the internet so not sure if it will help you out but have a look.
Pfaff Questions Answered When was my Pfaff Sewing Machine Made