Vintage Trufood Infant Weight Obstetric Calculator Slide Rule Circa 1950s Midwifes Baby Babies

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Vintage Trufood Infant Weight Obstetric Calculator Slide Rule Circa 1950s Midwifes Baby Babies

Item - Vintage Calculator, Trufood Infant Weight/Obstetric Calculator, Circa 1960s; used to work out expected date of delivery and growth rate of the baby. The Double Sided Rectangular Slide Rule is made from two pieces of plastic (celluloid) with a central metal rivet, allowing the central round disks to rotate within the rectangular. The Calculator was produced for Trufood as a give away to professionals (midwifes, etc....); Trufood went on to amalgamate with Cow & Gate in the early 1970s.

Maker - Unknown; but produced for Trufood Limited of Green Bank, London, E.1.

Circa - 1950s

Construction -  Plastic

Country of Origin - Not Marked but believe to be English

Dimensions - 4" by 2.75"

Weight - 6 gram

Condition - Excellent Used Condition

Other Interesting Points - This particular slide rule is double sided with the scales as follows -

Side One - Dial System to work out babies expected delivery date from first day of last period. 

Side Two - Dial System to work out babies expected growth rate

Note regarding the pictures - Depending on your screen the slide rule may appear to look a little yellow but it is in fact the pictures.....the slide rule is more of a white/ivorine colour..... 

(Please see all Photos).

POSTAGE & PACKAGING

There is a charge of £1.00 for Postage and Packaging to all U.K. Residents (Standard UK Delivery), we will also ship Worldwide please check table below for delivery costs. If you have any questions please feel free to contact!

Postage Rates for this Item
UK Next Day Delivery £5.00
UK Recorded Delivery £2.00
UK Standard Delivery £1.00
Air Mail Europe £1.50
Air Mail Outside Europe £2.00
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