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Updates Here's my update with more data points

I am so confused Patrick's 260-D has a serial number of 100521 My 260-EK has a serial number of 75059 , which seems like it should have been made before the 260-D, except for the suffix. If the 260-D is the Canadian version, would it have a different serial number? Nick

Serial numbers? Do you have the serial numbers and date codes for these machines? Nick

My Eureka 238 and 260 238-D 2000381 (1969?) 260-EK 75059 (1966?) Can anyone help me get these numbers more precisely dated?

Hi! I have an odd question. Back in the 1940s-1980s, typewriter dealers had a resource available to them to help them determine the age of trade-ins. This was called the NOMDA Blue Book, published by the National Office Machine Dealers Association. I'm wondering if a similar resource exists...

So far, it looks linear! So far, it looks like the data points are linear! I can't imagine it would make sense for them to stamp different ranges on the metal data plates. I suspect the model designation was stamped separately from the serial number.

Some of my data Here's what I have so far. Numbers on the right are approximations. Numbers on the left are known data points

With preliminary analysis, yours seems like it's from 1971. I'd love to see the rest of the machine :D

Thanks! Thanks! If you have any other Eurekas, please post models, serial numbers and/or date codes. Every data point makes it easier :D

It absolutely can Please, please, please post your model info tags!

My estimate My estimate is that Eureka sold about 1650000 machines per year.

APPROXIMATE DATA Here is my approximation so far. When I get more data points, I will correct this.

248 B 1306951 67 1967

I'm not entirely sure about the 1979 date for the 1419--1975-6 seems more likely to me.

Data points so far Here are the data points I have so far from this forum.

I found this ad from 1973, and am wondering if this Eureka model actually exists, or if it's a combination of two for the ad. It shows a basic model Eureka, like the 1401, but with a headlight, but no height adjustment, and printed Eureka script across the base of the hood.

The McLean Museum They didn't have much information on various models. I"m going to email them again

Check my model data thread Paul, Check out my model data thread. I'm hoping we can all add 1400 series serial numbers and date codes in the same format

Eureka 1428 D Serial number 34811723 Date code: 1987

Serial numbers? Does anyone know if Eureka serial numbers are model-specific, or if it's a big consecutive series? From Hoover300's work in pre-1947 Eurekas, it looks like the D model may have a single range, across models (?) I'm really curious about the 1400 series models. It would make more...